feat(bootstrap-vue): Replace BootstrapCSS Util classes with GitLab Classes

mentioned in commit 2aae7c5b

mentioned in merge request gitlab-org/editor-extensions/gitlab-jetbrains-plugin!1195 (merged)

mentioned in merge request status-page!903

mentioned in merge request gitlab!169801 (merged)

mentioned in merge request gitlab-org/gitlab-services/design.gitlab.com!4147 (closed)

mentioned in merge request gitlab-org/frontend/playground/accessibility-scanner!55 (closed)

mentioned in merge request gitlab-org/frontend/pajamas-adoption-scanner!352 (merged)

mentioned in merge request gitlab-org/editor-extensions/gitlab-jetbrains-plugin!1249 (closed)

mentioned in merge request gitlab-org/frontend/playground/accessibility-scanner!58 (merged)