feat(css): Addition Add `gl-sm-pr-3 ` and `gl-sm-w-half` `gl-md-ml-3` utility class

mentioned in commit e3ce57f6

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2690 (closed)

mentioned in merge request status-page!447 (merged)

mentioned in merge request gitlab!78336 (merged)

mentioned in merge request gitlab-docs!2365 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!2698 (merged)