Add update doc for CE 9.0 to EE 9.0

See merge request !1394

Update storage settings to allow extra values per shard

See merge request !1362

Add Upload count to usage data

See merge request !1401

Fix Projects::UpdateService#repository_storage spec to take account of schema changes in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9597

Fix the #change_repository_storage tests to take account of schema changes in https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/9597

Improve storage validation after configuration structure update

See merge request !9811

Verbosify blocked pipeline status description

Closes #29134

See merge request !9800

Change activity view wording

See merge request !9777

CE upstream

Closes gitaly#109 and gitlab-ce#28515

See merge request !1371

Move u2f javascript library to webpack config

See merge request !9755

Fix wrong message on starred projects filtering

Closes #28402

See merge request !9488

Update the gitignore and gitlab-ci templates for 9.0

See merge request !9824

# Conflicts:
#   doc/api/v3_to_v4.md

Remove timeout from awards_handler_spec.js

See merge request !9822

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

Port of 1381-present-commits-pagination-headers-correctly to EE

See merge request !1357

specify where to finish database HA setup

See merge request !9731

Fixed typo with project service documentation link

See merge request !9708

Fix name colision when importing GitHub pull requests from forked repositories

Closes #29034

See merge request !9719

Refactor dropdown_milestone_spec.rb

Closes #29162

See merge request !9814

Resolve "Squash commits fails for branches named HEAD"

Closes #1861

See merge request !1391

Convert Issue into ES6 class

See merge request !9636

Remove hidden text from subscribe button

Closes #29165

See merge request !9790

Decrease Capybara timeout for CI environment

Closes #29091

See merge request !9816