Add controller.JCasC.configMapAnnotations to allow setting annotations on the JCasC ConfigMaps

[hrivera-ntap]

What does this PR do?

This PR provides a new parameter controller.JCasC.configMapAnnotations that allows for customizing the annotations on all of the JCasC config map resources that are templated out.

• Fixes #1120

If you modified files in the ./charts/jenkins/ directory, please also include the following:

Submitter checklist

• [x] I bumped the "version" key in ./charts/jenkins/Chart.yaml.
• [x] I added a new changelog entry to ./charts/jenkins/CHANGELOG.md.
• [x] I followed the technical requirements.
• [x] I ran .github/helm-docs.sh from the project root.

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