Fix redocly plugins

[osfameron]

These crashed when description was missing, so add defaulting/logic to fix.
Enable the excise-rbac for the other APIs for the *-capella targets.

Ping @torcolvin to review - I don't think this checklist applies to this PR?
I can create a CBG if required.

CBG-0000

Describe your PR here...

• Use bullet points if there's more than one thing changed

Pre-review checklist

• Removed debug logging (fmt.Print, log.Print, ...)
• Logging sensitive data? Make sure it's tagged (e.g. base.UD(docID), base.MD(dbName))
• Updated relevant information in the API specifications (such as endpoint descriptions, schemas, ...) in docs/api

Dependencies (if applicable)

• Link upstream PRs
• Update Go module dependencies when merged

Integration Tests

• GSI=true,xattrs=true https://jenkins.sgwdev.com/job/SyncGateway-Integration/000/

[torcolvin]

I think I know why the redocly_preview_links doesn't work but this only publishes not generated previews back to the PR. This is because this is a PR from a fork, and we always do PRs from branches like CBG-xxx. I granted the docs team access to be able to push branches like this. You can't merge without a PR.

We like all commits to have a jira ticket for tracking but it can be a DOC ticket, since you are doing the work, or a CBG ticket. No preference. Since this is a commit against main which is tracking 3.3, after this is merged, we typically create a backport ticket by cloning the existing ticket and marking as [3.2.1 backport]. Then once that is merged, I move the tag for docs. This process should probably be described in our meta doc docs.

Finally, this looks good except that I think info.title should be modified for public-capella since it says Sync Gateway instead of App Services. I verified with npx @redocly/cli@latest preview-docs public-capella.

[osfameron]

Closing in favour of #7153