Document support for Elasticsearch 6.x is deprecated

See merge request gitlab-org/gitlab!45619

Add e2e test for real time assignee updates

See merge request gitlab-org/gitlab!44214

Adds an e2e test for real time updates of issue assignees

In the following MRs:

1. https://gitlab.com/gitlab-org/gitlab/-/merge_requests/35292
1. https://gitlab.com/gitlab-org/gitlab/-/merge_requests/33176

We broke support support for these previous version by introducing
features that are only available in 6.4+ and 6.2+
https://gitlab.com/gitlab-org/gitlab/-/issues/271218 .

The simplest option here seems to just be to document that it's
unsupported rather than trying to fix these since we're going to remove
support soon anyway for all of `6.x`.

Fix update-tests-metadata CI job

See merge request gitlab-org/gitlab!46097

Remove usage statistics docs links

See merge request gitlab-org/gitlab!45856

The upgrade to Ruby v2.7.2 meant that only bundler v2 was installed by
default. rspec_profiling v0.0.5 required bundler v1, but v0.0.6 relaxed
the dependency to allow for bundler 2 (see
https://github.com/foraker/rspec_profiling/commit/6ad1ec4e37).

Associate Terraform state versions with the CI job that created them

See merge request gitlab-org/gitlab!45347

Fix Gitpod gems

See merge request gitlab-org/gitlab!46092

[RUN ALL RSPEC] Fix migrate-from-v12.10.0 job not working with Ruby v2.7

See merge request gitlab-org/gitlab!46073

This test needs bundler v1.17.3 to work, so install that first.

The grpc and google-protobuf gems need to be updated to work with Ruby
v2.7. When we check out the v12.10.0-ee tag, we manually patch the
versions in the Gemfile before attempting to run the migration.

Add new search params to metadata

See merge request gitlab-org/gitlab!45896

Update unaffiliated files with metadata

See merge request gitlab-org/gitlab!46066

Make the feature template more efficient

See merge request gitlab-org/gitlab!42617

Add basic_search parameter to search API

See merge request gitlab-org/gitlab!45761

Change GraphQL::ID_TYPE to a GlobalIDType

See merge request gitlab-org/gitlab!45833

Replace MR 38183, subgroup support for target namespaces

See merge request gitlab-org/gitlab!46065

Add none-unassigned metadata to pages

Update ruby parser for Ruby v2.7.2

See merge request gitlab-org/gitlab!46061

This MR removes docs links in the usage quotas
page

Replace reference to frontend lead with foundations member

See merge request gitlab-org/gitlab!45589

Also add additional information about how to request legal
reviews for new, unapproved JavaScript licenses.

Replace bootstrap classes for alerts in ping consent

See merge request gitlab-org/gitlab!45723

Migrate related issue widget tooltips in vue

See merge request gitlab-org/gitlab!45458

This eliminates the warning:

```
warning: parser/current is loading parser/ruby27, which recognizes
warning: 2.7.1-compliant syntax, but you are running 2.7.2.
```

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/45347

Fix feature flag check failing when database is empty

See merge request gitlab-org/gitlab!46056

Enable pointer events in tooltips

See merge request gitlab-org/gitlab!44206

Fix location of workhorse socket in comment

See merge request gitlab-org/gitlab!45983

Fix Merge Request "Edit in Web IDE" dropdown link on MR diffs page

See merge request gitlab-org/gitlab!45653

As seen in QA pipelines and discussed in
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/42229, the Grape
API initialization would fail if the database were empty. We now check
the existence of the `features` table to prevent this from happening.

This still does not allow us to change the feature flag dynamically, but
it unblocks the test failures.

and remove rubocop exception

Replace GlDeprecatedBadge in Security Dashboard Project List

See merge request gitlab-org/gitlab!45917