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

Import issues from CSV

Closes #49231

See merge request gitlab-org/gitlab-ce!23532

In the previous code, we locked the project during the migration
scheduling step, which works fine for small setups, but can be
problematic in really big installations.

We now moved the logic to inside the worker, so we minimize the time a
project will be read-only. We also make sure we only do that if
reference counter is `0` (no current operation is in progress).