Add granular token authorization for AI and integration REST endpoints

Alex Buijsrequested to merge
gpat/ai-integrations into master

What does this MR do and why?

Add granular token authorization for 16 AI and integration REST endpoints.

Annotates the endpoints with their granular (fine-grained) personal access token permissions and boundaries, with request specs verifying each.

References

Issue: #573623 (closed)

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