feat: add getDefaultPluralFor method

[metacosm]

Fixes #6313

Description

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
• [x] I Added CHANGELOG entry regarding this change
• [ ] I have implemented unit tests to cover my changes
• [x] 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[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarCloud

[metacosm]

I would make it explicit in the javadoc that this might give an unexpected result, thus the plural form is not necessarily same as the plural form on the server.

Added a comment to that effect.

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud