Geo Replication Details: Replication info

What does this MR do and why?

Broken off from !182620 (closed)
Part of #509363 (closed)
Uses feature flag geo_replicables_show_view

This change is part of a larger effort to add a Details view for Replication Registry Items for Geo. This change is focused on adding the second section to the page Replication information

Screenshots or screen recordings

Replication Status	Screenshot
Pending
Started
Synced
Failed
Unknown
Missing on Primary (non-error)

How to set up and validate locally

Setup Geo (optional)

Important: To properly test Geo you will need a separate GDK setup. Setup is straightforward but takes some time. Another option is to validate the code functionally and if needed schedule a call to sync and I can screen share my instance.

1. Ensure no other GDKs are running. gdk stop/gdk kill
2. Open an empty directory and install and run Geo with the one-line command found on the Easy installation instructions
3. Access your primary and secondary Geo instances via 127.0.0.1:3000 and 127.0.0.1:3001.

Testing

1. Enable the feature flag Feature.enable(:geo_replicables_show_view)
2. Access your primary GDK Geo Page (127.0.0.1:3000/admin/geo)
3. Scroll down to the very bottom Replication details section
4. Click one of the blue links (ex: Project Repositories)
5. Click one of the records in the list
6. Ensure the Replication information is visible and shows the correct state (see below on how to mock states)

How to mock states

note: The rails-background-jobs will come behind and rescue any changes you make after a few minutes

1. On secondary-gdk/gitlab rails c

Trigger replication failure

registry = Geo::ProjectRepositoryRegistry.first

registry.failed!(message: "The sync has failed", error: ArgumentError.new("arg error"))

Explicitly set replication status

# Available states PENDING, STARTED, SYNCED, FAILED
registry = Geo::ProjectRepositoryRegistry.first

registry.update(state: 'FAILED')

Mark missing on primary

registry = Geo::ProjectRepositoryRegistry.first

registry.update(missing_on_primary: true)