Enable configuring of categories in CRD generation

[MichaelMorrisEst]

Description

Adds a new annotation @Categories that enables users of the CRD generator to set categories in the generated CRD.

Closes #5795

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [X] Feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change
• [ ] Chore (non-breaking change which doesn't affect codebase; test, version modification, documentation, etc.)

Checklist

• [X] Code contributed by me aligns with current project license: Apache 2.0
• [ ] I Added CHANGELOG entry regarding this change
• [X] I have implemented unit tests to cover my changes
• [ ] I have added/updated the javadocs and other documentation accordingly
• [ ] No new bugs, code smells, etc. in SonarCloud report
• [X] I tested my code in Kubernetes
• [ ] I tested my code in OpenShift