Fix model tests for tipsv2
Author: kaixuanliu
Pull request: yes

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Fix following common failed test cases:
```
FAILED tests/models/tipsv2/test_modeling_tipsv2.py::Tipsv2VisionModelTest::test_model_parallelism
FAILED tests/models/tipsv2/test_modeling_tipsv2.py::Tipsv2TextModelTest::test_model_parallelism
FAILED tests/models/tipsv2/test_modeling_tipsv2.py::Tipsv2ModelTest::test_model_parallelism
```
and 1 failed test case for XPU specific:
`FAILED tests/models/tipsv2/test_modeling_tipsv2.py::Tipsv2ModelIntegrationTest::test_inference - ValueError: No matching expectation found for ('xpu', 5, None)`

Comments:
**[For maintainers]** Suggested jobs to run (before merge)

run-slow: tipsv2

@ydshieh @vasqu pls help review, thx!

Thank you for your contribution 🤗!

## CI Security Gate — automatic approval blocked

This PR was **not** automatically approved for CI because the security gate failed.

**Possible reasons:**
- The PR touches 50 or more files — only PRs with fewer than 50 changed files are automatically approved
- A changed file is outside the allowed directories (`src/`, `tests/`, `docs/`, `utils/`), has a disallowed extension (only `.py`, `.txt`, `.md` permitted outside `tests/` and `docs/`), or is not `.md`/`.yml` inside `docs/`
- A new high-severity security issue was detected in the changed Python files (Bandit check)

See the [workflow run](https://github.com/huggingface/transformers/actions/runs/29468204075) for the exact violations.

A maintainer can review and manually approve CI if a finding is a false positive.

run-slow: tipsv2

Security gate is a false positive will manually trigger the fast ci as well

[Workflow Run ⚙️](https://github.com/huggingface/transformers/actions/runs/29501386726)

This comment contains `run-slow`, running the specified jobs: 

models: ["models/tipsv2"]
quantizations: []

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### CI recap

**Dashboard:** [View test results in Grafana](https://transformers-ci.lor-e.huggingface.cool/d/pytest-observability-by-pr/pytest-observability-branch?var-pr=47356)
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## CI Results
[Workflow Run ⚙️](https://github.com/huggingface/transformers/actions/runs/29501386726)

### Commit Info
| Context | Commit | Description |
|---------|--------|-------------|
| RUN | [258bc9d6](https://github.com/huggingface/transformers/commit/258bc9d60bab84b5de436d8e018d5f6ff274ffc1) | workflow commit (merge commit) |
| PR | [b871a643](https://github.com/kaixuanliu/transformers/commit/b871a64311ec4362b09824784c2afc7cf07ced45) | branch commit (from PR) |
| main | [28596623](https://github.com/huggingface/transformers/commit/28596623762cb409bb1c9234f04bfb1269b1ece1) | base commit (on `main`) |

⚠️ **Model CI failed to report results**

The test failure analysis could not be completed. Please check the [workflow run](https://github.com/huggingface/transformers/actions/runs/29501386726) for details.


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