This reverts merge request !33301

Merge branch '218428-use-background-migration-to-copy-historic-data-between-non-partitioned-and-partitioned-tables' into 'master'

Use BG Migration to copy historic data to a partitioned table

See merge request gitlab-org/gitlab!33891

Move the BackgroundMigration helper methods out of the MigrationHelpers
into their own module, so they can be reused in other contexts without
pulling in the entire MigrationHelper module.

Set checkboxes to be on by default for list

See merge request gitlab-org/gitlab!34893

Docs: redirect fork_sample_project.md to new page

See merge request gitlab-org/gitlab!35175

This page needs renaming to match its current title.

Copy private and public keys, not primary and public in docs

See merge request gitlab-org/gitlab!34885

Move editor_service to services dir

See merge request gitlab-org/gitlab!35032

- I did not remove the functionality to toggle them on/off
  as I think this feature could be useful in the future

Remove AWS/Azure note that mentions they aren't validated

See merge request gitlab-org/gitlab!35161

Remove duplication of project_ids_without_integration

See merge request gitlab-org/gitlab!34763

Explicitly call gitlab-ui config function

See merge request gitlab-org/gitlab!35025

Move mixed config info into new section

See merge request gitlab-org/gitlab!35088

Docs: move new_or_existing_website.md

See merge request gitlab-org/gitlab!35089

Fix for Readme startup query and Conversion of fetch headers to axios

See merge request gitlab-org/gitlab!35147

Docs: steps to run frontend in production mode locally

See merge request gitlab-org/gitlab!35016

Add Feature Flag Issues Widget

See merge request gitlab-org/gitlab!33337

Put widget behind a feature flag

Fix list in feature flag doc

Closes #223231

See merge request gitlab-org/gitlab!35116

Refactor /publish to use a designated service entrypoint rather than queue a worker

Closes #219266

See merge request gitlab-org/gitlab!33925

- Add back mark for publication
- Add back error message

Extract Alert Management alert presenters

See merge request gitlab-org/gitlab!34529

Docs: PHP composer registry is coming in 13.2

See merge request gitlab-org/gitlab!35153

Removes redundant step from Security Issue template

See merge request gitlab-org/gitlab!35151

Expand the dashbord fixture to include metrics data

See merge request gitlab-org/gitlab!33301

Add author_id index to audit_events

Closes #222639

See merge request gitlab-org/gitlab!34643

Optimize subgroup permission checking

See merge request gitlab-org/gitlab!35061

This commits removes the last step from "Documentation and final
details" because it's a bit redundant:

* There's no value of having the developer specifying the vulnerability
  was fixed.
* Security implementation issue is automatically closed once the MR
  targeting master is merged, so the last step is probably overlooked by
most of the developers

Added release dates for Geo data

Closes #198481

See merge request gitlab-org/gitlab!35027

Fix group path autofill

See merge request gitlab-org/gitlab!34934

Fix pipeline index json Gitaly N+1 with `latest?`

Closes #19697

See merge request gitlab-org/gitlab!34160

This commit adds support for preloading pipeline refs when serializing a
bunch of pipelines, using the new Gitaly RPC for checking commits for a
given set of refs.

Remove !important clauses from button disabled styles

See merge request gitlab-org/gitlab!34955

Update dependency @gitlab/svgs to v1.141.0

See merge request gitlab-org/gitlab!35097