Prevent keypair from being rotated when saving credentials, only rotate on explicit button click

[ronak-701685]

What I Did

• Prevented the default update of the keypair when the Save button is clicked in the IdTokenCredentials configuration.
• Added logic to ensure the keypair is only updated when explicitly requested by the user.
• Updated the UI and backend to support this behavior.
• Modified related tests to reflect the new functionality.

Relevant Issues

• Fixes #97

Testing done

OpenIDConnectIdToken.mp4

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 demonstrate the feature works or the issue is fixed

[ronak-701685]

Review request: @jglick

[jglick]

Compare #30. Currently this plugin is not really maintained. If I have some time to actually set aside and think about what is safe and correct I have a list of important changes to make, starting with keypair rotation. From a quick glance this looks reasonable but any change to this plugin requires more than a quick glance.