Add milestone issue/MR links to release block footer
In #29020 (closed), we updated Milestones with the ability to be associated with one or more Releases.
One of the features originally planned was a footer for each release block on the Releases page that linked to the issues and merge requests associated with the release (through the associated milestones):
We made some progress on this piece of the feature in %12.4 (see !16564 (closed)) but ultimately de-scoped this piece due to technical reasons (see this thread: !16564 (comment 226312303)).
This issue is to re-implement this feature once we have the necessary technical prerequisites finished. Specifically:
- Add a new "release" filter to the issue and merge request search pages (#32632 (closed))
- Add links to these search pages (pre-populated with the new "release" filter) into the Release API (!17858 (merged) )