fix(data workflow tests): cancel running workflow executions before delete

[vincent-cognite]

Improve test harness for workflows:

• Workflow API now rejects deletion while executions are still RUNNING (jazz-api#2424, CDF-28136).
• Add integration test helpers to cancel running executions and wait for termination before deleting workflows.
• Update workflow integration test teardown/cleanup paths to use safe delete, and cancel the retried execution left running by test_trigger_cancel_retry_workflow.

[codecov]

Codecov Report

❌ Patch coverage is 65.09434% with 37 lines in your changes missing coverage. Please review.
✅ Project coverage is 93.60%. Comparing base (e2152c0) to head (d6d0c38).

Files with missing lines	Patch %	Lines
tests/tests_integration/test_api/test_workflows.py	65.09%	37 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2701      +/-   ##
==========================================
- Coverage   93.68%   93.60%   -0.08%     
==========================================
  Files         503      503              
  Lines       50696    50778      +82     
==========================================
+ Hits        47494    47533      +39     
- Misses       3202     3245      +43     

Files with missing lines	Coverage Δ
tests/tests_integration/test_api/test_workflows.py	85.04% <65.09%> (-5.38%)	⬇️

... and 6 files with indirect coverage changes

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[gemini-code-assist]

Code Review

This pull request introduces helper functions _cancel_running_executions_for_workflow and _safe_delete_workflows in the integration tests to cancel active executions before deleting workflows, ensuring cleaner teardowns. The review feedback suggests improving robustness by wrapping execution cancellation in try...except CogniteAPIError blocks to prevent test flakiness if executions are already completed, and to properly respect the ignore_unknown_ids flag when attempting to cancel executions for non-existent workflows.

[gemini-code-assist]

Code Review

This pull request improves the stability and cleanup of workflow integration tests by introducing helper functions to cancel running executions before deleting workflows or versions, and isolating permanent workflows per pytest-xdist worker to prevent race conditions. The reviewer recommended optimizing the _safe_delete_workflows helper by batching workflow retrieval calls to avoid an N+1 query pattern, which will speed up the test cleanup process.

[vincent-cognite]

too invasive and complicated