UI Warning for v2alpha1 APIRule that applies to all paths

[triffer]

Description
In the APIRule v2alpha1 API Proposal ADR it is mentioned in an example that there should be a warning if a rule applies to all paths.

path: /* # Should be warning user that it is not recommended, as it applies to all paths

If this is still valid we should add this warning to the UI or otherwise update the ADR.

DoD:

• Provide unit and integration tests.
• Provide documentation.
• Verify if the solution works for both open-source Kyma and SAP BTP, Kyma runtime.
• If you changed the resource limits, explain why it was needed.
• Verify that your contributions don't decrease code coverage. If they do, explain why this is the case.
• Add release notes.

Attachments
Follow up issue of #1282