docs: unhide compactor GRPC config

[slim-bean]

What this PR does / why we need it:

Was discovered by a nice community member that they had errors in their logs:

ts=2024-04-11T14:01:16.501014486Z caller=spanlogger.go:109 user=fake level=error msg="failed loading deletes for user" err="rpc error: code = Unavailable desc = connection error: desc = \"error reading server preface: EOF\""

They are using TLS between Loki components and found that they were missing getting the TLS setting correct for the compactor client used by query time filtering of delete requests (which are stored in the compactor), and also discovered that we were not exposing these configs in the docs.

This PR removes the hidden tag such that these will now show up in the docs.

Which issue(s) this PR fixes:

Special notes for your reviewer:

Checklist

• Reviewed the CONTRIBUTING.md guide (required)
• Documentation added
• Tests updated
• Title matches the required conventional commits format, see here
• Changes that require user attention or interaction to upgrade are documented in docs/sources/setup/upgrade/_index.md
• For Helm chart changes bump the Helm chart version in production/helm/loki/Chart.yaml and update production/helm/loki/CHANGELOG.md and production/helm/loki/README.md. Example PR
• If the change is deprecating or removing a configuration option, update the deprecated-config.yaml and deleted-config.yaml files respectively in the tools/deprecated-config-checker directory. Example PR

[grafanabot]

This PR must be merged before a backport PR will be created.