This ports the changes from
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10462/
to CE

Add email clarification

See merge request gitlab-org/gitlab-ce!27645

Add clarification on namespace creation

See merge request gitlab-org/gitlab-ce!27772

fix include example

See merge request gitlab-org/gitlab-ce!27571

Docs: Environments Documentation review

See merge request gitlab-org/gitlab-ce!27215

Merge branch 'docs/60785-docs-feedback-masked-variables-is-not-clear-what-unescaped-characters-means' into 'master'

Clarify masked variables docs

Closes #60785

See merge request gitlab-org/gitlab-ce!27580

- Add note that must contain only letters, numbers, underscore
- Add example of escape characters
- Add regex used for validation

closes https://gitlab.com/gitlab-org/gitlab-ce/issues/60785

Resolve "Masked Variable still printed in log output on gitlab.com"

Closes #60945

See merge request gitlab-org/gitlab-ce!27768

Create dashboards endpoint & setup dashboard post-processing

Closes #60383

See merge request gitlab-org/gitlab-ce!27405

Refactor quarantine helper

See merge request gitlab-org/gitlab-ce!27766

Admin instance level settings for pages Let's Encrypt

See merge request gitlab-org/gitlab-ce!27361

Store Let's Encrypt account email in application settings
Also add explicit terms of service consent

Deployment Chat Notifications

See merge request gitlab-org/gitlab-ce!27338

This enables sending a chat message to Slack or Mattermost
  upon a successful, failed, or canceled deployment

Add rollout type to variables list.

See merge request gitlab-org/gitlab-ce!27757

Prevent text selection when dragging in issue boards

Closes #59378

See merge request gitlab-org/gitlab-ce!27724

Documented the Admin Area's `Dashboard`

See merge request gitlab-org/gitlab-ce!27445

Part of issue 57874

Update GitLab Runner Helm Chart to 0.4.1/11.10.1

See merge request gitlab-org/gitlab-ce!27627

List group name restrictions

Closes #60341

See merge request gitlab-org/gitlab-ce!27609

CI: Fix upload of screenshots in gitlab:ui:visual

See merge request gitlab-org/gitlab-ce!27758

Before this commit uploading of screenshots failed with

    WARNING: tests/__image_snapshots__/: no matching files
    ERROR: No files to upload
    ERROR: Job failed: exit code 1

After this commit it works again

    Uploading artifacts...
    gitlab-ui/tests/__image_snapshots__/: found 90 matching files
    Uploading artifacts to coordinator... ok

Update NFS docs to reflect new Rugged backports

See merge request gitlab-org/gitlab-ce!27632

Add ProjectMetricsDashboardSetting model and table

See merge request gitlab-org/gitlab-ce!27550

This new table will be used to store the external_dashboard_url which
allows users to add a link to their external dashboards (ex Grafana)
to the Metrics dashboard.

By moving methods closer to where they are called.

We backported the Rugged implementations of a Git access to older
versions of GitLab. Update the documentation to reflect this.

Relates to:

* https://gitlab.com/gitlab-com/www-gitlab-com/merge_requests/21833/diffs
* https://gitlab.com/gitlab-org/release/tasks/issues/749

Backport Environments Dashboard SCSS Changes

See merge request gitlab-org/gitlab-ce!27498

Move all static fixtures to static directory

See merge request gitlab-org/gitlab-ce!27668

Add ZAP Full Scan support to DAST vendored template

See merge request gitlab-org/gitlab-ce!27513

Fix #57351 - Add .NET Core YAML template

Closes #57351

See merge request gitlab-org/gitlab-ce!25604

Fix reference-style links in CI predefined vars

See merge request gitlab-org/gitlab-ce!27584