CE port of "e2e QA tests for Group level project templates"

See merge request gitlab-org/gitlab-ce!23987

Merge branch '50224-rails5-duplicate-key-value-violates-unique-constraint-index_gpg_signatures_on_commit_sha' into 'master'

Resolve "[Rails5] duplicate key value violates unique constraint "index_gpg_signatures_on_commit_sha""

Closes #50224

See merge request gitlab-org/gitlab-ce!24226

Adjusts duplicated line when commenting on unfolded diff lines (in the bottom)

Closes #56051

See merge request gitlab-org/gitlab-ce!24201

CE Backport: Add library helpers to use in Roadmap

See merge request gitlab-org/gitlab-ce!24232

Disable resolve conflicts for protected branches

Closes #53463

See merge request gitlab-org/gitlab-ce!23842

Add feature spec for Release page MVC

See merge request gitlab-org/gitlab-ce!24143

Fixes missing margin in releases block

Closes #56076

See merge request gitlab-org/gitlab-ce!24229

Adds `newDate` helper to copy date object without keeping reference.
Adds negative length support in `getTimeframeWindowFrom` to go
back in time.

Document how to run frontend tests

Closes #53757

See merge request gitlab-org/gitlab-ce!24202

Add headers to files in the tree list on merge requests

Closes #54807

See merge request gitlab-org/gitlab-ce!23954

CE backport of "Track export issues CSV usage on GitLab.com with Snowplow"

See merge request gitlab-org/gitlab-ce!24217

Without this, sometimes we will get a unique constraint violation about
GPG signatures on MySQL.

Remove comma from issuable email

See merge request gitlab-org/gitlab-ce!24218

Fixes z-index and margins of archived alert

Closes #56019

See merge request gitlab-org/gitlab-ce!24193

Wait for Web IDE commit animation

Closes #55972

See merge request gitlab-org/gitlab-ce!24196

EE MR: https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9067

Improve `bin/secpick` script and add more options

See merge request gitlab-org/gitlab-ce!24117

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/54807

Update Codesandbox smooshpack library

Closes #53779

See merge request gitlab-org/gitlab-ce!24191

Added feature to specify a custom Auto DevOps chart repository

Closes #55791

See merge request gitlab-org/gitlab-ce!24162

Check if specific type of background migration are done

See merge request gitlab-org/gitlab-ce!24032

Useful for checking progress.

Add committers and authors methods on MergeRequest

See merge request gitlab-org/gitlab-ce!24204

Add docs on how web terminals are secured

Closes #52681

See merge request gitlab-org/gitlab-ce!24099

CE backport of gitlab-ee!8936

See merge request gitlab-org/gitlab-ce!23976

Link highlighting of jon.doe@example.com swallowed the trailing backtick, destroying formatting.

See merge request gitlab-org/gitlab-ce!24133

Document new incoming email address format

See merge request gitlab-org/gitlab-ce!23991

Hashed Storage: Only set as `read_only` when starting the per-project migration

See merge request gitlab-org/gitlab-ce!24128

Fix doc for "Allow getting the merge base of multiple revisions"

See merge request gitlab-org/gitlab-ce!24051

These are used by the EE-only approvers feature