Migrate Gitlab::Git::Wiki#file to Gitaly

Closes gitaly#689

See merge request gitlab-org/gitlab-ce!15014

Add login mattermost to Test::Integration::Mattermost

See merge request gitlab-org/gitlab-ce!15033

Returns a SSH url for go-get=1

Closes #38858

See merge request gitlab-org/gitlab-ce!14990

Resolve "Convert fuzzaldrin-plus.js library to be a Yarn managed library"

Closes #39633

See merge request gitlab-org/gitlab-ce!15097

Closes gitaly#689

Migrate Gitlab::Git::Wiki#page to Gitaly

Closes gitaly#677

See merge request gitlab-org/gitlab-ce!14955

Normalize LDAP DN when looking up identity

Closes #39559

See merge request gitlab-org/gitlab-ce!15103

Bump carrierwave to 1.2.1

Closes #39580

See merge request gitlab-org/gitlab-ce!15072

Move multi-file editor store to Vuex

See merge request gitlab-org/gitlab-ce!15046

Closes gitaly#677

Upgrade Ruby to 2.3.5

See merge request gitlab-org/gitlab-ce!15099

Improve the maintenance policy page

See merge request gitlab-org/gitlab-ce!15112

Load participants async

Closes #23206

See merge request gitlab-org/gitlab-ce!14836

Fix missing issue assignees

Closes #39170

See merge request gitlab-org/gitlab-ce!15109

Make clear that we may backport bug fixes to the previous stable
release.
Signed-off-by: Rémy Coutable <remy@rymai.me>

Fix overlap of right-sidebar and wiki create page form

Closes #39509

See merge request gitlab-org/gitlab-ce!15075

Adds project_id to pipeline hook data

Closes #31454

See merge request gitlab-org/gitlab-ce!15044

Allow promoting project milestones to group milestones

Closes #38777

See merge request gitlab-org/gitlab-ce!14831

Migrate Gitlab::Git::Wiki#delete_page to Gitaly

Closes gitaly#673

See merge request gitlab-org/gitlab-ce!14910

Handle large values on `MergeRequestDiffCommit` dates

Closes #39561

See merge request gitlab-org/gitlab-ce!15093

Fix example typo.

See merge request gitlab-org/gitlab-ce!15104

Signed-off-by: Rémy Coutable <remy@rymai.me>

Part of gitlab-org/gitlab-ce#38040

Remove issue and issue status select from global namespace

See merge request gitlab-org/gitlab-ce!15090

Hashed Storage support for Attachments

See merge request gitlab-org/gitlab-ce!15068

Adds callback function to initial cluster request

Closes #39639

See merge request gitlab-org/gitlab-ce!15105

Fix namespacing for MergeWhenPipelineSucceedsService in MR API

Closes #39619

See merge request gitlab-org/gitlab-ce!15088

Add Packagist project service

See merge request gitlab-org/gitlab-ce!14493

Closes gitaly#673