Revert container image pin in CI benchmarks

Closes #5433, reverts #5432, and also:
* Uses [ghcr.io container images](https://cml.dev/doc/self-hosted-runners/#docker-images) for extra speed
* Updates `actions/checkout` to `v3` (note that `v2` is [deprecated](https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/))
* Follows the new naming convention for environment variables introduced with [iterative/cml#1272](https://github.com/iterative/cml/pull/1272)

_The documentation is not available anymore as the PR was closed or merged._

<details>
<summary>Show benchmarks</summary>

PyArrow==6.0.0

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.013736 / 0.011353 (0.002383) | 0.006253 / 0.011008 (-0.004755) | 0.127076 / 0.038508 (0.088568) | 0.040997 / 0.023109 (0.017888) | 0.394744 / 0.275898 (0.118846) | 0.454285 / 0.323480 (0.130805) | 0.009864 / 0.007986 (0.001878) | 0.005093 / 0.004328 (0.000765) | 0.098714 / 0.004250 (0.094464) | 0.044308 / 0.037052 (0.007255) | 0.421951 / 0.258489 (0.163462) | 0.462280 / 0.293841 (0.168439) | 0.059979 / 0.128546 (-0.068567) | 0.020607 / 0.075646 (-0.055039) | 0.443593 / 0.419271 (0.024321) | 0.062332 / 0.043533 (0.018799) | 0.411335 / 0.255139 (0.156196) | 0.426524 / 0.283200 (0.143324) | 0.118233 / 0.141683 (-0.023450) | 1.877681 / 1.452155 (0.425527) | 1.865271 / 1.492716 (0.372555) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.234791 / 0.018006 (0.216784) | 0.557322 / 0.000490 (0.556833) | 0.000528 / 0.000200 (0.000328) | 0.000105 / 0.000054 (0.000051) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.030260 / 0.037411 (-0.007151) | 0.122594 / 0.014526 (0.108068) | 0.142142 / 0.176557 (-0.034414) | 0.197098 / 0.737135 (-0.540037) | 0.150978 / 0.296338 (-0.145360) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.622644 / 0.215209 (0.407435) | 6.320078 / 2.077655 (4.242423) | 2.552755 / 1.504120 (1.048635) | 2.188647 / 1.541195 (0.647453) | 2.226602 / 1.468490 (0.758112) | 1.288083 / 4.584777 (-3.296694) | 5.624143 / 3.745712 (1.878431) | 3.208382 / 5.269862 (-2.061480) | 2.115222 / 4.565676 (-2.450455) | 0.146420 / 0.424275 (-0.277856) | 0.014464 / 0.007607 (0.006857) | 0.816470 / 0.226044 (0.590425) | 7.984049 / 2.268929 (5.715120) | 3.364942 / 55.444624 (-52.079682) | 2.552306 / 6.876477 (-4.324171) | 2.664575 / 2.142072 (0.522503) | 1.556177 / 4.805227 (-3.249050) | 0.263389 / 6.500664 (-6.237275) | 0.076861 / 0.075469 (0.001391) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.553734 / 1.841788 (-0.288054) | 18.365029 / 8.074308 (10.290721) | 20.993993 / 10.191392 (10.802601) | 0.235642 / 0.680424 (-0.444782) | 0.047084 / 0.534201 (-0.487117) | 0.555610 / 0.579283 (-0.023673) | 0.659413 / 0.434364 (0.225049) | 0.639284 / 0.540337 (0.098947) | 0.756317 / 1.386936 (-0.630620) |

</details>
PyArrow==latest

<details>
<summary>Show updated benchmarks!</summary>

### Benchmark: benchmark_array_xd.json

| metric | read_batch_formatted_as_numpy after write_array2d | read_batch_formatted_as_numpy after write_flattened_sequence | read_batch_formatted_as_numpy after write_nested_sequence | read_batch_unformated after write_array2d | read_batch_unformated after write_flattened_sequence | read_batch_unformated after write_nested_sequence | read_col_formatted_as_numpy after write_array2d | read_col_formatted_as_numpy after write_flattened_sequence | read_col_formatted_as_numpy after write_nested_sequence | read_col_unformated after write_array2d | read_col_unformated after write_flattened_sequence | read_col_unformated after write_nested_sequence | read_formatted_as_numpy after write_array2d | read_formatted_as_numpy after write_flattened_sequence | read_formatted_as_numpy after write_nested_sequence | read_unformated after write_array2d | read_unformated after write_flattened_sequence | read_unformated after write_nested_sequence | write_array2d | write_flattened_sequence | write_nested_sequence |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.014709 / 0.011353 (0.003356) | 0.006673 / 0.011008 (-0.004335) | 0.133718 / 0.038508 (0.095210) | 0.035699 / 0.023109 (0.012590) | 0.459089 / 0.275898 (0.183191) | 0.538071 / 0.323480 (0.214591) | 0.007376 / 0.007986 (-0.000610) | 0.004688 / 0.004328 (0.000360) | 0.104909 / 0.004250 (0.100659) | 0.064942 / 0.037052 (0.027890) | 0.466158 / 0.258489 (0.207669) | 0.566100 / 0.293841 (0.272259) | 0.057368 / 0.128546 (-0.071178) | 0.021572 / 0.075646 (-0.054075) | 0.413826 / 0.419271 (-0.005446) | 0.079543 / 0.043533 (0.036010) | 0.493313 / 0.255139 (0.238174) | 0.517787 / 0.283200 (0.234587) | 0.119836 / 0.141683 (-0.021847) | 1.833956 / 1.452155 (0.381801) | 2.003288 / 1.492716 (0.510572) |

### Benchmark: benchmark_getitem\_100B.json

| metric | get_batch_of\_1024\_random_rows | get_batch_of\_1024\_rows | get_first_row | get_last_row |
|--------|---|---|---|---|
| new / old (diff) | 0.276013 / 0.018006 (0.258007) | 0.549194 / 0.000490 (0.548704) | 0.010939 / 0.000200 (0.010739) | 0.000129 / 0.000054 (0.000075) |

### Benchmark: benchmark_indices_mapping.json

| metric | select | shard | shuffle | sort | train_test_split |
|--------|---|---|---|---|---|
| new / old (diff) | 0.034983 / 0.037411 (-0.002428) | 0.131576 / 0.014526 (0.117050) | 0.140651 / 0.176557 (-0.035906) | 0.186455 / 0.737135 (-0.550681) | 0.146309 / 0.296338 (-0.150029) |

### Benchmark: benchmark_iterating.json

| metric | read 5000 | read 50000 | read_batch 50000 10 | read_batch 50000 100 | read_batch 50000 1000 | read_formatted numpy 5000 | read_formatted pandas 5000 | read_formatted tensorflow 5000 | read_formatted torch 5000 | read_formatted_batch numpy 5000 10 | read_formatted_batch numpy 5000 1000 | shuffled read 5000 | shuffled read 50000 | shuffled read_batch 50000 10 | shuffled read_batch 50000 100 | shuffled read_batch 50000 1000 | shuffled read_formatted numpy 5000 | shuffled read_formatted_batch numpy 5000 10 | shuffled read_formatted_batch numpy 5000 1000 |
|--------|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 0.675973 / 0.215209 (0.460763) | 6.821862 / 2.077655 (4.744208) | 3.090307 / 1.504120 (1.586187) | 2.710679 / 1.541195 (1.169484) | 2.891577 / 1.468490 (1.423087) | 1.306160 / 4.584777 (-3.278617) | 5.629763 / 3.745712 (1.884051) | 4.662578 / 5.269862 (-0.607283) | 2.670195 / 4.565676 (-1.895482) | 0.153867 / 0.424275 (-0.270408) | 0.016028 / 0.007607 (0.008421) | 0.878702 / 0.226044 (0.652658) | 8.801612 / 2.268929 (6.532683) | 4.005520 / 55.444624 (-51.439104) | 3.124755 / 6.876477 (-3.751721) | 3.382132 / 2.142072 (1.240060) | 1.525951 / 4.805227 (-3.279277) | 0.263350 / 6.500664 (-6.237315) | 0.079285 / 0.075469 (0.003815) |

### Benchmark: benchmark_map_filter.json

| metric | filter | map fast-tokenizer batched | map identity | map identity batched | map no-op batched | map no-op batched numpy | map no-op batched pandas | map no-op batched pytorch | map no-op batched tensorflow |
|--------|---|---|---|---|---|---|---|---|---|
| new / old (diff) | 1.647591 / 1.841788 (-0.194197) | 18.281646 / 8.074308 (10.207338) | 21.072142 / 10.191392 (10.880750) | 0.232236 / 0.680424 (-0.448188) | 0.026126 / 0.534201 (-0.508075) | 0.546926 / 0.579283 (-0.032357) | 0.634496 / 0.434364 (0.200132) | 0.604345 / 0.540337 (0.064007) | 0.730159 / 1.386936 (-0.656777) |

</details>
</details>

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