Resolve Ruby 2 deprecations in lib

# Using the last argument as keyword parameters is deprecated

Deprecation messages:

- [ ] `manual_retry_custom_auto_renew`:

```shell
---
? test_data_maintenance/manual_retry_custom_auto_renew#execute_when_the_amendment_service_throws_an_error_updates_the_zuora_subscription_with_the_error
: - |
    DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/app/services/auto_renew_service.rb:188: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
    /builds/gitlab-org/customers-gitlab-com/lib/gitlab/tracking.rb:29: warning: The called method `track_event' is defined here

```

<hr>

- [ ] `tracking`:

```shell
---
test_gitlab/tracking_tracking_events_.self_describing_event_can_track_self_describing_events:
- |
  DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/spec/lib/gitlab/tracking_spec.rb:171: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
  /builds/gitlab-org/customers-gitlab-com/lib/gitlab/tracking.rb:76: warning: The called method `self_describing_event' is defined here
test_gitlab/tracking_tracking_events_.event_can_track_events:
- |
  DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/spec/lib/gitlab/tracking_spec.rb:137: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
  /builds/gitlab-org/customers-gitlab-com/lib/gitlab/tracking.rb:62: warning: The called method `event' is defined here

```

<hr>

- [ ] `queues`:

```shell
---
test_health_check/queues_when_there_are_too_many_enqueued_items_processes_the_requested_queue:
- |
  DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/lib/health_check/custom.rb:5: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
  /builds/gitlab-org/customers-gitlab-com/lib/health_check/queues.rb:4: warning: The called method `check' is defined here

```

<hr>

- [ ] `subscriptions`:

```shell
---
? test_zuora/client/subscriptions.get_when_valid_is_expected_to_eq_{:account_id=>"8ad09f8a7f01ada8017f045de71428c2",_:account_name=>"danny's_org",_:account_number=>"a00...ng__c=>nil,_:turn_on_operational_metrics__c=>nil,_:turn_on_seat_reconciliation__c=>nil,_:version=>8}
: - |
    DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/spec/lib/zuora/client/subscriptions_spec.rb:16: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
    /builds/gitlab-org/customers-gitlab-com/lib/zuora/client/subscriptions.rb:9: warning: The called method `get' is defined here

```

<hr>

- [ ] `digital_signature`:

```shell
---
test_zuora/digital_signature#valid?_when_params_are_valid_when_payment_type_is_"ach"_is_expected_to_equal_true:
- |
  DEPRECATION WARNING: /builds/gitlab-org/customers-gitlab-com/lib/zuora/digital_signature.rb:15: warning: Using the last argument as keyword parameters is deprecated; maybe ** should be added to the call
  /builds/gitlab-org/customers-gitlab-com/lib/zuora/digital_signature.rb:35: warning: The called method `initialize' is defined here

```

<hr>

## How to resolve?

- Option 1: maybe `**` should be added to the call?
- Option 2: Rewrite the code to keyword arguments completely.

Story points: 1.0