Partial style cleanup of style guide page

See merge request gitlab-org/gitlab!48960

Fix some easier-to-fix issues in the style guide to get closer to
Vale compliance.

Remove Bootstrap 4's Cards class name from Epics

See merge request gitlab-org/gitlab!48856

Migrate environment dashboard dropdown

See merge request gitlab-org/gitlab!48318

Update index.md, fix error Secret-Detection.gitlab-ci.yml is empty or does not exist

See merge request gitlab-org/gitlab!48446

Auto Rollback When a critical alert is raised

See merge request gitlab-org/gitlab!48222

This commit integrates the Auto Rollback service with
Alert model.

Allow filtering by member relations in GraphQL

See merge request gitlab-org/gitlab!48372

Improve logging on feature flag modification

See merge request gitlab-org/gitlab!48417

This commit improves the logging

Improve GraphQL pagination specs

See merge request gitlab-org/gitlab!48496

Update Epics tooltip on the permissions page with correct tier information

See merge request gitlab-org/gitlab!48942

Adds gl-buttons classes to issue settings

See merge request gitlab-org/gitlab!48471

Update header text on project security dashboard

See merge request gitlab-org/gitlab!48872

Adjust Kroki docs with the correct tier

See merge request gitlab-org/gitlab!48906

Add confirm modal to reactivate user

See merge request gitlab-org/gitlab!48173

- same styling as rest of the admin user actions.

Fix kwargs deprecation warnings in lines unfolder spec

See merge request gitlab-org/gitlab!48810

Remove unified tests script

See merge request gitlab-org/gitlab!46926

Now that we have migrated all specs to Jests (except for a few
excceptions), we can remove the unified tests script and update the docs
accordingly.

Edited for Vale rules

See merge request gitlab-org/gitlab!48849

Don't call FindCommit for raw blobs

See merge request gitlab-org/gitlab!48917

Add type filtering in appearance page of the admin panel

See merge request gitlab-org/gitlab!48709

Move uninstall_command to Clusters::Concerns::ApplicationCore

See merge request gitlab-org/gitlab!48828

Remove support for Kubernetes 1.13, add 1.18

See merge request gitlab-org/gitlab!48503

Convert future tense to present tense

See merge request gitlab-org/gitlab!48525

More cleaning up of future tense in docs, in favor of present tense.

Add a second TXT entry for domain verification

See merge request gitlab-org/gitlab!47006

Update Gitaly version

See merge request gitlab-org/gitlab!48957

Docs: Present deploy token as alternative to job token

See merge request gitlab-org/gitlab!48881

Resolve "Improve slow tests in ./spec/features/ide/user_sees_editor_info_spec.rb"

See merge request gitlab-org/gitlab!48074

Add permissions for Security bot

See merge request gitlab-org/gitlab!48676

Treeshake bootstrap.js

See merge request gitlab-org/gitlab!48682

Build on-call schedule empty state

See merge request gitlab-org/gitlab!46639

Replace prepend-bottom-20 in devise

See merge request gitlab-org/gitlab!48402