Merge branch 'issuable-edit-form-actions-spacing-fix' into 'master'

Issuable edit form: Fix spacing between action buttons

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/173395



Merged-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Approved-by: Julia Miocene <jmiocene@gitlab.com>
Approved-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Co-authored-by: Sascha Eggenberger <seggenberger@gitlab.com>