fix(crd-generator): Fix processing private and package-private CustomResource classes

[baloo42]

Description

Fixes #6685

Aligns the capabilities of the CRDGenerator collector with the api-v2, so that all found CustomResource classes can be processed. This solution makes the default constructor of a CustomResource class accessible if it is required.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• 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

• Code contributed by me aligns with current project license: Apache 2.0
• I Added CHANGELOG entry regarding this change
• 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
• I tested my code in Kubernetes
• I tested my code in OpenShift

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
81.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[manusa]

LGTM, thx!