[CI][UR] Add detailed test summary reporting to UR conformance tests
Add comprehensive test result logging to Unified Runtime tests similar
to SYCL E2E tests:
- Enhanced LIT_OPTS with --show-unsupported, --show-pass, --show-xfail
to display test status details
- Added --no-progress-bar for cleaner CI output
- Redirect test output to log files (adapter_tests.log, conformance_tests.log)
- Added steps to display full logs in collapsible groups
- Added steps to extract and report test summaries (Failed Tests,
Unexpectedly Passed Tests, Unresolved Tests, Timed Out Tests, Testing Time)
- Report summaries both in step output and GitHub Step Summary
This improves visibility into which tests pass, fail, or are skipped,
making it easier to diagnose CI issues.