fix: adds filtering and switches to iterative traversal

[shawkins]

Description

closes #5584

It doesn't seem like we need traversal below java. classes as we're only looking for our annotations. Also we can switch to an iterative traversal, which should be less likely to blow out.

cc @andreaTP

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

[andreaTP]

Thanks a lot for sorting this out @shawkins !
I'm happy with your implementation as it looks more robust than before.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

92.5% Coverage
0.0% Duplication

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