Remove unneeded views for Integrations > Prometheus
What does this MR do and why?
Changes: This MR cleans up a portion of dead code related to the removal of devopsmonitor Category:Metrics features.
Scope: Anything under app/views/shared/*prometheus*. These view partials used to be responsible for displaying the prometheus integration configuration and list of custom metrics defined in the project. As that functionality has been removed, we should be able to clean up these partials & related helpers.
Context: The Metrics Dashboard (used for monitoring apps deploying using gitlab) was deprecated in 14.7 and removed from the product in 16.0. There are many more files to remove related to this cleanup, but this should be a self-contained chunk.
- grouprespond related issue: Metrics: Delete models & database tables/columns (#397142)
- Monitor:Metrics removal epic: Monitor: Metrics Deprecation and Removal (&10107)
- Reference MR with all related removals: Draft: Remove all remaining metrics dashboard-r... (!160325 - closed)
- Metrics removal is blocking cells: Drop old unused tables for prometheus alerts (#461838 - closed)
MR acceptance checklist
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How to set up and validate locally
These features were disabled in %16.0 behind the :remove_monitor_metrics feature flag, and have been partially deleted since then. So there's nothing really to test here. It's no longer possible to set up these features.