[GitLab Runner] Add new metrics

[dkirov-dd]

What does this PR do?

Motivation

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Add the qa/skip-qa label if the PR doesn't need to be tested during QA.
• If you need to backport this PR to another branch, you can add the backport/<branch-name> label to the PR and it will automatically open a backport PR once this one is merged

[datadog-datadog-prod-us1]

⚠️ Tests

✨ Fix all issues with Cursor

⚠️ Warnings

🧪 1 Test failed

test_check from test_integration.py (Datadog) (Fix with Cursor)

Needed exactly 2 candidates for 'gitlab_runner.acceptable_job_queuing_duration_exceeded_total', got 0
Expected:
        MetricStub(name='gitlab_runner.acceptable_job_queuing_duration_exceeded_total', type=None, value=None, tags=['optional:tag1'], hostname=None, device=None, flush_first_value=None)
Difference to closest:
        Expected name: gitlab_runner.acceptable_job_queuing_duration_exceeded_total
        Found gitlab_runner.process_start_time_seconds

Similar submitted:
Score   Most similar
0.61    MetricStub(name='gitlab_runner.process_start_time_seconds', type=0, value=1770304627.16, tags=['optional:tag1'], hostname='', device=None, flush_first_value=False)
...

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.
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