Resolve "GitlabUsagePingWorker is not running on GitLab.com"

See merge request gitlab-org/gitlab-ce!14867

Add Performance category to the changelog

Closes #36417

See merge request gitlab-org/gitlab-ce!14865

Upgrading Monaco

Closes #38607

See merge request gitlab-org/gitlab-ce!14629

Add Test::Integration::Mattermost

See merge request gitlab-org/gitlab-ce!14818

Add Gitlab::Git::Env.to_env_hash

See merge request gitlab-org/gitlab-ce!14841

update postgresql requirements

See merge request gitlab-org/gitlab-ce!14885

Resolve "Remove "Build failed" TODO if it has been auto-retried"

Closes #38236

See merge request gitlab-org/gitlab-ce!14869

We can currently reduce the number of times we specify the tag of a
given example group by moving them hoisting them up one level to the
containing `feature`

This was added as part of the previous filtering via RSpec::Config.  It
should have been removed previously as part of moving the logic to
specify the tags we wanted in Specs::Runner

Fix alignment for indeterminate marker in dropdowns

Closes #38963

See merge request gitlab-org/gitlab-ce!14809

Conflict resolution refactor

See merge request gitlab-org/gitlab-ce!14747

Fix diff parser so it tolerates to diff special markers in the content

Closes #34431

See merge request gitlab-org/gitlab-ce!14848

When a build is retried automatically, we close any open todos. However, we do
that _before_ creating a new build failed todo.

To solve this, we check if the build is retried before creating the todo. We
also ensure that the build _instance_ has the correct attribute set, without
needing to reload it from the database.

It's adding additional potentially confusing behaviour to derive test
tagging from the file path, as it's not immediately apparent where that
lives when considering the tests in isolation.  Instead, just explicitly
tag.

* Remove the tagging of examples based on :file_path
* Explicitly tags scenarios as :core, or :mattermost

On GitLab.com, we see that cron jobs sometimes don't run. This appears to be
because the process that polls for current cron jobs only has a 60 second
validity period, so if (for whatever reason) it misses those 60 seconds, we have
to wait until the next execution.

For the usage ping, this is particularly problematic, as that's only scheduled
to run once a week.

Changing it to run for every minute in a 10 minute period should work around
this, if the above diagnosis is correct. The job itself obtains an exclusive
lease for 24 hours, so rescheduling in quick succession is safe.

Fix confusing double usage of 'metadata'

See merge request gitlab-org/gitlab-ce!14871

Here we convert Specs::Runner#rspec to use keyword arguments[1] and pass
named parameters rather than a pre-processed array of cli switches.
This allows parameter to cli logic to live just in Specs::Runner.

[1] https://robots.thoughtbot.com/ruby-2-keyword-arguments

Popen with a timeout

See merge request gitlab-org/gitlab-ce!14872

Docs for Add "implements" to the default issue closing message regex

See merge request gitlab-org/gitlab-ce!14880

Backport a change in milestone_select from EE

See merge request gitlab-org/gitlab-ce!14878

Merge branch 'fix/sm/38960-collect-usage-pings-gcp-cluster-enabled-and-gcp-cluster-disabled-instead-of-gcp-cluster-count' into 'master'

Collect usage pings `Gcp::Cluster.enabled` and `Gcp::Cluster.disabled`, instead of `Gcp::Cluster.count`

Closes #38960

See merge request gitlab-org/gitlab-ce!14807

Include a .hidden directory in pages artifact extraction tests

See merge request gitlab-org/gitlab-ce!14852

Move retry button to sidebar

Closes #27654

See merge request gitlab-org/gitlab-ce!14873

Update the settings api documentation

See merge request gitlab-org/gitlab-ce!14877

[skip ci]

Remove global dropdown shortcut from help modal

Closes #39111

See merge request gitlab-org/gitlab-ce!14876

Remove shortcut JS classes from global namespace

See merge request gitlab-org/gitlab-ce!14783

added date parameter for time tracking

See merge request gitlab-org/gitlab-ce!14866

Update Vuex version

Closes #39096

See merge request gitlab-org/gitlab-ce!14868

Entrypoint is intended as a base class, so mention that in the comment.