Silence warnings for fields with no getters

[rsandell]

Testing done

### Submitter checklist
- [ ] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [ ] Ensure that the pull request title represents the desired changelog entry
- [ ] Please describe what you did
- [ ] Link to relevant issues in GitHub or Jira
- [ ] Link to relevant pull requests, esp. upstream and downstream changes
- [ ] Ensure you have provided tests - that demonstrates feature works or fixes the issue

[rsandell]

@amuniz are you able to merge and release this please?

[amuniz]

Sure. What warnings is this fixing BTW? IDE?

[rsandell]

There are sporadic system log serialization warnings about the class because of the missing getters.

[rsandell]

@amuniz Thanks for the merge! But this PR needs a significant label for the release to happen. :pray:

[amuniz]

@rsandell added. However I can't trigger the release pipeline manually, do you know of some way to trigger a release?

[rsandell]

https://github.com/jenkinsci/aws-credentials-plugin/actions/workflows/cd.yaml

[rsandell]

There should be a "Run Workflow button" somewhere there