Revert "Merge branch 'user-tracking-settings' into 'master'"

See merge request gitlab-org/gitlab-ce!32235

This reverts merge request !31826

Change database codeowners to database maintainer group

See merge request gitlab-org/gitlab-ce!32229

Aligning with backend maintainers, @gitlab-org/maintainers/database is
now used for codeowners.

apps: remove the too big "Mirror a repository" header

Closes #66445

See merge request gitlab-org/gitlab-ce!32097

Remove the too big "Mirror a repository" header

Closes gitlab-ce#66445

See merge request gitlab-org/gitlab-ee!15658

Fix dropdown filter tests

Closes #13819

See merge request gitlab-org/gitlab-ee!15659

Added note that Multiple Issue Boards moved tiers.

See merge request gitlab-org/gitlab-ce!31829

fix: remove double %

See merge request gitlab-org/gitlab-ce!32178

Add documentation about Gitaly concurrency limiter

See merge request gitlab-org/gitlab-ce!31902

Remove unnecessary include

Closes gitlab-ee#13764

See merge request gitlab-org/gitlab-ce!32173

Change mdl to markdownlint for docs linting

Closes #65806

See merge request gitlab-org/gitlab-ce!31994

Change from ruby mdl to node markdownlint, add
config file to root of project, delete old config
file, update exceptions, and fix one doc that
was didn't meet standards

Add backticks and remove brackets causing kramdown warnings

See merge request gitlab-org/gitlab-ce!32197

Square and Angle bracket use causes kramdown warnings,
so changed or enclosed in backticks as needed

Document that License Compliance defaults to Python 3

See merge request gitlab-org/gitlab-ce!31910

License Compliance now uses Python 3 by default.

See https://gitlab.com/gitlab-org/gitlab-ee/issues/12032

Update docs for forgotten secrets file

See merge request gitlab-org/gitlab-ce!31393

These need to be reset

Added sample to container scanning

See merge request gitlab-org/gitlab-ce!32166

Updated container scanning docs with a sample config

Document how GitLab stores passwords

See merge request gitlab-org/gitlab-ce!32077

Improve Gitaly path details

See merge request gitlab-org/gitlab-ce!31931

related to https://gitlab.com/gitlab-org/gitlab-ce/issues/65422