Update default branch from master to main

See merge request gitlab-org/gitlab-runner!2930

* 14-0-stable:
  Update CHANGELOG for v14.0.0
  Merge branch 'ci/package-environment' into 'master'
  Merge branch 'ci/scope-deploy-token' into 'master'
  Merge branch 'ci/scope-linux-docker-images' into 'master'

Add environment name for package jobs

See merge request gitlab-org/gitlab-runner!2959

Add environment name for package jobs

See merge request gitlab-org/gitlab-runner!2959

Add environment for gitlab stable release

See merge request gitlab-org/gitlab-runner!2962

Add details on how to assign Runner Manager to security fork project

See merge request gitlab-org/gitlab-runner!2974

This reverts commit 0e6920b6.

Update all tests, links that point to `master` to either `main` or a
specific tag.

Final command to check of `master` string:
```
rg 'master' -g '!.gitlab/issue_templates/trainee-backend-maintainer.md' -g '!.gitlab/issue_templates/Security developer workflow.md' -g '!.gitlab/ci/docs.gitlab-ci.yml'  -g '!docs/faq/README.md' -g '!docs/.vale/gitlab/DefaultBranch.yml' -g '!docs/.vale/gitlab/InclusionCultural.yml' -g '!docs/executors/kubernetes.md' -g '!vendor/' -g '!.git' -g '!CONTRIBUTING.md' -g '!common/config.go' -g '!executors/kubernetes/kubernetes_test.go' -g '!Makefile' -g '!CHANGELOG.md' -g '!PROCESS.md'
```

reference: https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27239

Run the following commnad to find all reference to `master`:

```
rg 'master' -g '!.gitlab/issue_templates/trainee-backend-maintainer.md' -g '!.gitlab/issue_templates/Security developer workflow.md' -g '!.gitlab/ci/docs.gitlab-ci.yml' .gitlab
```

Ignore the `.gitlab/ci/docs.gitlab-ci.yml` since it depends on upstream
changes which will be done in https://gitlab.com/gitlab-org/gitlab-runner/-/merge_requests/2925

reference https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27239

Run the command below so that you get all the `master` strings. We are
ignoring some of them explictly since they are rules, or upstream
changes.

```shell
rg --hidden 'master' -g '!faq/README.md' -g '!.vale/gitlab/DefaultBranch.yml' -g '!.vale/gitlab/InclusionCultural.yml' -g '!executors/kubernetes.md'
```

This commit assumuses that
https://gitlab.com/gitlab-org/charts/gitlab-runner is using `main` as a
default branch as well.

reference: https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27239

Docs: Updated Shell topic titles to be more clear

See merge request gitlab-org/gitlab-runner!2972

Update environment name for Linux docker images

See merge request gitlab-org/gitlab-runner!2970

Update environment name for Linux docker images

See merge request gitlab-org/gitlab-runner!2970

Fix outdated VS Code package recommendation

See merge request gitlab-org/gitlab-runner!2964

Don't run fuzz variable mask test for docs

See merge request gitlab-org/gitlab-runner!2965

Add environment for gitlab stable release

See merge request gitlab-org/gitlab-runner!2962

Part of https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963 we
are
[scoping](https://docs.gitlab.com/ee/ci/variables/#limit-the-environment-scope-of-a-cicd-variable)
certain environment variables to jobs so they are only available in that
job. For `DOCKER_HUB_PASSWORD` and `DOCKER_HUB_USER` we already scoped
it for `stable/docker_images/*` in
https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963#note_601887655
but this doesn't match the `stable/docker_image` environment for the
linux containers.

Update the name to match the wildcard scope.

reference https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963

Add docs about DEB/RPM packages signature verification

See merge request gitlab-org/gitlab-runner!2963

* origin/master:
  Follow up MR edit

Follow up docs edit for "Enable kubernetes attach strategy by default"

See merge request gitlab-org/gitlab-runner!2966

Related to: https://gitlab.com/gitlab-org/gitlab-runner/-/merge_requests/2955\#note_601762770

Change order of steps to configure autoscaling

See merge request gitlab-org/gitlab-runner!2665

Enable kubernetes attach strategy by default

Closes #10341

See merge request gitlab-org/gitlab-runner!2955

In https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963 we want to
[scope](https://docs.gitlab.com/ee/ci/variables/#limit-the-environment-scope-of-a-cicd-variable)
the `DEPLOY_TOKEN` to 1 specific job since only `stable gitlab release`
requires this variable.

https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963

Make check test directives depend on prepare_done

Closes #27961

See merge request gitlab-org/gitlab-runner!2947

`package-deb` and `package-rpm` need to have the GPG_KEY and
GPG_PASSPHRASE available to them so it can sign packages. Add an
environment so these variables can be
[scoped](https://docs.gitlab.com/ee/ci/variables/#limit-the-environment-scope-of-a-cicd-variable)
to this environment.

reference https://gitlab.com/gitlab-org/gitlab-runner/-/issues/27963#note_601438675

Revert "Merge branch 'ajwalker/trace-masking-url' into 'master'"

See merge request gitlab-org/gitlab-runner!2950

so that we know that the CI image is available