Rename "remote development cluster-agent" to "namespace cluster-agent" auth policy

Issue: Rename existing declarative policies on namesap... (#516090 - closed)

What does this MR do and why?

Renames auth policies on workspace agent mapping management to be more explicit to the intended scope (namespace mapped vs org mapped).

References

Rename existing declarative policies on namesap... (#516090 - closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

A green pipeline should be sufficient, as this is just a rename and should break NOTHING. For a sanity check, if needed, you can map and unmap agents locally and create a workspace.

MR acceptance checklist

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