ci(documentation): Update metadata-ingestion:testScripts to add coverage and standardized test reporting

[devashish2203]

Summary

• Update :metadata-ingestion:testScripts task to produce coverage and junit output.
• Migrate documentation workflows to the report-test-results composable action for consistent test result reporting and job summaries
• Consolidate all pytest JUnit XML output into a test-results/ directory across all test tasks (testQuick, testSingle, testIntegrationBatch*, testScripts)
• Move shared pytest args (--durations, -vv, --continue-on-collection-errors, --junit-xml) from build.gradle into setup.cfg and a new scripts/pytest.ini
• Fix coverage filename separator in python-coverage.gradle (coverage-<project><name> → coverage-<project>-<name>)
• Refactor clean task into a proper cleanGeneratedFiles Delete task, including cleanup for test-results/, scripts/.coverage, and scripts/test-results

Test plan

• Verify metadata-ingestion CI matrix jobs produce JUnit XML under metadata-ingestion/test-results/ and publish a test summary
• Verify documentation CI job produces JUnit XML under metadata-ingestion/scripts/test-results/ and publishes a test summary
• Confirm coverage reports still upload correctly to Codecov with the fixed filename separator

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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