feat(css): remove gl-lg-top-13 and gl-lg-align-items-flex-start

mentioned in commit ccf502fe

mentioned in merge request status-page!604 (merged)

mentioned in merge request gitlab!98793 (merged)

mentioned in merge request gitlab-docs!3125 (merged)

mentioned in merge request status-page!609 (closed)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!3062 (merged)

mentioned in commit 30f1530e

mentioned in merge request gitlab-org/frontend/pajamas-adoption-scanner!87 (merged)