Add check in linked graphs

See merge request gitlab-org/gitlab!60062

Externalise strings in viewers/_readme.html.haml

See merge request gitlab-org/gitlab!58456

Externalize strings in users/_profile.html.haml

See merge request gitlab-org/gitlab!58106

Update Usage Ping Metrics - Alerting

See merge request gitlab-org/gitlab!60044

Load correct data when switching branches in pipeline editor

See merge request gitlab-org/gitlab!57941

Resolve "Expose webhook data for Key via its own data-builder class"

See merge request gitlab-org/gitlab!59608

Enable Style/ParenthesesAroundCondition cop for HAML-lint

See merge request gitlab-org/gitlab!59553

Docs: add troubleshooting for schannel error for TLS

See merge request gitlab-org/gitlab!59922

Add Free tier to Pages-related docs

See merge request gitlab-org/gitlab!60003

Crop image for dashboard templates doc

See merge request gitlab-org/gitlab!60041

Update Gitaly version

See merge request gitlab-org/gitlab!60093

Remove unnecessary image from tracing doc

See merge request gitlab-org/gitlab!60056

Move Debian endpoints concern to correct file

See merge request gitlab-org/gitlab!59811

Merge branch '322786-denormalize-project-permissions-to-merge-request-in-elasticsearch' into 'master'

Denormalize project permissions to merge request in Elasticsearch

See merge request gitlab-org/gitlab!59731

Add Packages::Debian::GenerateDistributionKeyService

See merge request gitlab-org/gitlab!53826

Backend for implementing real-time issue assignees using GraphQL subscriptions

See merge request gitlab-org/gitlab!59834

Resolve "JWT API token support for Terraform Module Registry"

See merge request gitlab-org/gitlab!56421

Review and revise YouTrack integration UI text

See merge request gitlab-org/gitlab!59998

Add metrics to monitor pipelines with policy jobs

See merge request gitlab-org/gitlab!59848

Optimize Nokogiri search for post-processing pipeline [RUN ALL RSPEC] [RUN AS-IF-FOSS]

See merge request gitlab-org/gitlab!59983

Users search: fix avatar size

See merge request gitlab-org/gitlab!59883

Refactor Key event data for webhooks

Handle Rails 6.1 ActiveModel::Errors changes

See merge request gitlab-org/gitlab!59861

Add validation to fork form with validation directive

See merge request gitlab-org/gitlab!55838

Contributes to https://gitlab.com/gitlab-org/gitlab/-/issues/271242

**Problem**

doc.search(...) operation has a bad performance for complex html
documents with many elements.

**Solution**

Avoid unnecessary doc.search calls.

1. Combine multiple search operations
2. Share calculated result between several filters

Reduce number of SQL queries on SystemNote create

See merge request gitlab-org/gitlab!59102

Update testcase links to new ones

See merge request gitlab-org/gitlab!60067

Return connection error for activation

See merge request gitlab-org/gitlab!59840

Modal errors as objects are introduced:
https://github.com/rails/rails/pull/32313

model.errors.first returns ActiveModel::Error object
that's why model.errors.first[1] doesn't work in Rails 6.1

We need a way that works both for 6.1 and 6.0 in order to
introduce changes gradually:

model.errors.values.first works for both versions.

Even though treating errors as a hash is deprecated it works
so we can introduce the changes in 6.0 and then fix the
deprecations when we're on 6.1

(cherry picked from commit b5ecc309314429040921233d4a6216655fede089)