Enhance CRD check to detect CRDs in subcharts and all locations

[acornett21]

Summary

Enhanced the not-contains-crds check to comprehensively detect CustomResourceDefinitions across all possible chart locations:

• Recursive subchart checking: Now detects CRDs in dependencies' /crds directories
• Templates scanning: Detects CRDs placed in /templates directory
• Root files scanning: Detects CRDs in chart root directory files
• Quoted kind handling: Properly detects CRDs with quoted YAML values (kind: "CustomResourceDefinition")

Previously, the check only examined the main chart's /crds directory, missing CRDs in subcharts and alternative locations.

Testing

Unit Tests

Added 5 new test cases with corresponding test charts:

• ✅ CRDs in /templates directory
• ✅ CRDs in root directory files
• ✅ CRDs in /charts subdirectory
• ✅ CRDs in subchart /crds directory
• ✅ CRDs with quoted kind values

All 7 total test cases pass (2 existing + 5 new).

Full Index Validation

Verified against the entire OpenShift Helm Charts index using scripts/verify-all-charts.sh:

• Successfully detected CRDs in charts that previously passed incorrectly (e.g., iax-operator-crd-rh)
• No false positives introduced
• Enhanced detection correctly identifies all CRD patterns

🤖 Generated with Claude Code

[github-actions]

Thanks for your pull request!

A maintainer will review this pull request and trigger functional testing by adding the ok-to-test label.

This comment was auto-generated by GitHub Actions.

[bcrochet]

/lgtm

[komish]

@acornett21 You should be okay to rebase this now.