Indexing the same project twice at the same time causes conflict errors
in Elasticsearch and this usually leads to failures which can lead to a
project never being successfully indexed correctly. The simplest
solution is to use a lock in the worker and just fail immediately if
it's already running and let Sideikiq retries requeue the project if it
does have more updates that need indexing. When it next runs it will
check if there are new commits that need indexing.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/32648

Fix validates example in DB migration styleguide

See merge request gitlab-org/gitlab!35821

Escape dashboard paths

Closes #206945

See merge request gitlab-org/gitlab!32714

Revise reduce repo size docs

See merge request gitlab-org/gitlab!35707

GitLab CI: Improve include, extends, & YAML anchors details

See merge request gitlab-org/gitlab!32943

Change required value for props

See merge request gitlab-org/gitlab!35620

Remove unused GRAFANA_PASSWORD secret in Gitaly Cluster docs

See merge request gitlab-org/gitlab!35812

Quarantine failing approval_rules_spec.rb test

See merge request gitlab-org/gitlab!35807

Remove unused spec shared example for snippets

See merge request gitlab-org/gitlab!35719

Switch to multi-node nomenclature on geo pages

See merge request gitlab-org/gitlab!35761

Encode dashboard paths when used as query params.

Docs: Migrate secure integration doc to rules

See merge request gitlab-org/gitlab!35782

Docs: Cross-link to local Tiller issue

Closes #224639

See merge request gitlab-org/gitlab!35677

Remove read_environment check for deployments

Closes #219146

See merge request gitlab-org/gitlab!35454

Usage Ping: Query recorded Prometheus metrics

See merge request gitlab-org/gitlab!35343

See https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/4343

Default gitaly_ruby_remote_branches_ls_remote on

See merge request gitlab-org/gitlab!35781

Deleting unused image files

See merge request gitlab-org/gitlab!35794

Make ProjectUpdateRepositoryStorageWorker idempotent

See merge request gitlab-org/gitlab!35483

Docs: Add image guidance to Style Guide

See merge request gitlab-org/gitlab!32442

Update 4_verify tests to use outer describe

See merge request gitlab-org/gitlab!35640

Correct status for moved and reopened issues on issue list

Closes #219331

See merge request gitlab-org/gitlab!33238

Docs: test for outdated GitLab versions

See merge request gitlab-org/gitlab!33879

Creates a Vale test for identifying points in the documentation
where we reference extremely old versions of GitLab, ones that
aren't even supported any more.

Update 6_release tests to use outer describe

See merge request gitlab-org/gitlab!35643

Update 8_monitor tests to use outer describe

See merge request gitlab-org/gitlab!35646

Update 5_package tests to use outer describe

See merge request gitlab-org/gitlab!35641

Extend `ApplicationSettings` to support `default_branch_name`

See merge request gitlab-org/gitlab!35681