Guard against deleted project feature entry

Closes #66482

See merge request gitlab-org/gitlab-ce!32187

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

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

In https://gitlab.com/gitlab-org/gitlab-ce/issues/66482, we see that a
project's `project_feature` association may be lazily loaded and hence
return `nil` if the entry is deleted if the `Project` is already loaded
in memory. To ensure we don't fail hard when this happens, assume all
features are disabled.

We can fix this issue by eager loading the `project_feature` in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32169, but we
shouldn't have to depend on that.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/66482

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

Add Documentation for `line-chart`

See merge request gitlab-org/gitlab-ce!32075

Add first and last name to User model

See merge request gitlab-org/gitlab-ce!31985

Removed unused method for name setter method

Adjusts snowplow to use cookies for sessions

Closes telemetry#77

See merge request gitlab-org/gitlab-ce!31826

This also restructures how and where the configuration for
Snowplow lives.

Fix N+1 Gitaly calls in /api/v4/projects/:id/issues

See merge request gitlab-org/gitlab-ce!32171

Upgrade GraphQL gem to 1.8.4 and replace echo function with a resolver

See merge request gitlab-org/gitlab-ce!32016

The `GraphQL::Function` has been deprecated in
favor of resolvers.

Refactor kubernetes setup in QA

See merge request gitlab-org/gitlab-ce!29799

Add cluster provider k3d

Change default visibility level for FogBugz imported projects to Private

See merge request gitlab-org/gitlab-ce!32142