Cache the number of open issues and merge requests

Closes #36622

See merge request !13639

Make the import take subgroups into account

Closes #36664 and #30546

See merge request !13670

[ci skip]

Update the rbnacl gem to 4.0.2

Closes #36806

See merge request !13740

Every project page displays a navigation menu that in turn displays the
number of open issues and merge requests. This means that for every
project page we run two COUNT(*) queries, each taking up roughly 30
milliseconds on GitLab.com. By caching these numbers and refreshing them
whenever necessary we can reduce loading times of all these pages by up
to roughly 60 milliseconds.

The number of open issues does not include confidential issues. This is
a trade-off to keep the code simple and to ensure refreshing the data
only needs 2 COUNT(*) queries instead of 3. A downside is that if a
project only has 5 confidential issues the counter will be set to 0.

Because we now have 3 similar counting service classes the code
previously used in Projects::ForksCountService has mostly been moved to
Projects::CountService, which in turn is reused by the various service
classes.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36622

This would occur when Wiki's are enabled on GitHub, but there is no
wiki repository

- Allow imports into nested groups
- Make sure it sets the correct visibility level when creating new
  groups

While doing this, I moved the import into a testable class, that made
it easier to improve.

Incorporate DiffService.CommitPatch Gitaly RPC

Closes gitaly#463

See merge request !13441

Remove tooltip from filtered search user

Closes #36696

See merge request !13752

Fix displaying events of removed events and events without commit messages

Closes #36685 and #36722

See merge request !13721

Add migration to remove pending delete projects with non-existing namespace

Closes #36541

See merge request !13598

Fix a potential timeout in `Gitlab::Logger.read_latest`

See merge request !13751

Stub `ForkedStorageCheck.storage_available?` by default in all specs

See merge request !13726

Fix inability to test some project integrations

Closes gitlab-ee#3194

See merge request !13729

Disable webpack.optimize because it's breaking karma in EE

See merge request !13720

Implement new system note icons

Closes #33503

See merge request !13673

Fixes group policy specs on MySQL.

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/36810

See merge request !13747

Add `:nested_groups` metadata to two subgroup-related specs

Closes #36811 and #36812

See merge request !13746

We should be defining the list of loggers in the controller, not the
view.

If this method was called for a file that didn't exist, we attempted to
first `build` it. But if the file wasn't writeable, such as a symlink
pointing to an unmounted filesystem, the method would just hang and
eventually timeout.

Further, this was entirely pointless since we were creating a file and
then shelling out to `tail`, eventually returning an empty Array. Now we
just skip building it and return the empty Array straight away.

Update Kubernetes install docs

Closes #36779

See merge request !13730

Resolve "Badges should not be HUGE"

Closes #36496

See merge request !13635

This changes the style of push events that remove tags or branches so
they don't display the commit details. This prevents displaying commit
details such as:

    000000 . --broken encoding

Instead we now simply display the header such as:

    Administrator deleted branch example-branch

This is displayed in the same style as events for newly created
branches/tags.

This commit also ensures that if no commit message is present we simply
don't display anything, instead of "--broken encoding".

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36685
Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/36722

Fix monaco loader test

See merge request !13682

Docs merge request diff nav

See merge request !13743

Add `:broken_storage` metadata to examples to disable this behavior only
when necessary.

Prevents these from failing on MySQL.

Closes #36811 and #36812.

Raise Git GC (Housekeeping) Lease Timeout to 24h

See merge request !13719

Enforce namespace of Kubernetes to lowercase

Closes #34762

See merge request !13732

[ci skip]