Fix https://gitlab.com/gitlab-org/gitlab-ce/issues/30642

Update templates

See merge request !10619

New git index

See merge request !10349

Remove unused scopes

See merge request !10609

Add foreign key on trigger requests

See merge request !10537

Change project view default for existing users and anonymous visitors to files+readme

Closes #29926

See merge request !10498

Added keyboard shortcuts to signed out menu

See merge request !10526

rake gitlab:update_templates

Fix the MR widget that merged any MR when choosing the option "Merge when pipeline succeeds" from the dropdown

Closes #29568

See merge request !10611

Fix container repository/tag location text copied into the clipboard

Closes #30695

See merge request !10587

I started out as I missed the foreign key on ci_triggers and projects.
However, it seemed Yorick caught this already on gitlab-org/gitlab-ce!9388.

Still I found a missing foreign key, between the trigger requests and
triggers. This commit adds it, and removes the depend: :destroy on the
Rails model Ci::Triggers

Remove redundant steps from .gitlab-ci-yml configs

See merge request !10425

Fixed wrong links in README.md

See merge request !10556

Set NODE_ENV for yarn:install in patch_versions.md

See merge request !10521

Issue 22424: Add tooltip to header of Done list

Closes #22424

See merge request !10574

Move the nested groups seed behind an environment flag

See merge request !10601

Remove double border on MR tab

See merge request !10593

Make webpack-dev-server process more resilient when switching branches.

Closes #30678

See merge request !10581

Fix redundant cache expiration in Repository

Closes #30146

See merge request !10575

Don't show 'Copy content' button on text files that are not rendered as text

See merge request !10563

Fix "Generate new recovery codes using SSH" documentation link

See merge request !10512

Disclaimer for testing guide not be be used in prod

See merge request !10468

Backport of EE changes in environments tests

See merge request !10528

This seed downloads 2.1 GB worth of repositories. Google can afford the
bandwidth, but if a person using the GDK is on a metered connection,
that's not so great.

Also the GDK test suite runs this seed, so every CI run for that project
had to download those as well. Needlessly wasteful.

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Backport Git-env code from EE "Fix push rules on Git 2.11" (gitlab-org/gitlab-ee!1525)

See merge request !10547