Use GitLab UI Utility Classes in Merge Request Title Partial
<!--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> - [Work on this issue](https://contributors.gitlab.com/manage-issue?action=work&projectId=278964&issueIid=330917) - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=330917) </details> <!--IssueSummary end--> The following discussions from !61605 should be addressed: - [ ] @sming-gitlab started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61605#note_574448662): > **nitpick**: would this be a good opportunity to use our `gl` util classes? > > `gl-pt-0` and `gl-pb-0` - [ ] @sming-gitlab started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61605#note_574448676): > **nitpick**: same thoughts as above, maybe an opportunity to use our `gl` util classes 😁 > > ``` > gl-float-left > ``` - [ ] @sming-gitlab started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61605#note_574448682): > **nitpick**: same thoughts as above, maybe an opportunity to use our `gl` util classes 😁 > > ``` > gl-display-none > gl-md-display-block (👈 this should be double checked 🤔) > ``` - [ ] @sming-gitlab started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/61605#note_574448697): > **nitpick**: same thoughts as above, maybe an opportunity to use our `gl` util classes 😁 > > ``` > gl-float-right > gl-display-block > gl-sm-display-none (👈 this should be double checked 🤔) > ```
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