Follow-up from "Merge request title migration" - consolidate branch styles
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=467151) </details> <!--IssueSummary end--> The following discussion from !155708 should be addressed: - [ ] @bsandlin started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/155708#note_1943742677): > **suggestion (non-blocking):** `gl-text-blue-500!` dead here as well. > > ```suggestion:-0+0 > class="gl-font-monospace gl-bg-blue-50 gl-rounded-base gl-font-sm gl-px-2 gl-mt-2 gl-truncate gl-max-w-26 gl-ml-2" > ``` > > This is out of scope, but I think consolidating the styles for this and the source branch link would be useful so we could just call `$options.branchStyles`
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