Prefer `flat_map` over `map` + `flatten` in specs

See merge request gitlab-org/gitlab-ee!14799

Although `flat_map` is equivalent to `map` + `flatten(1)`
(note the level 1) we can apply this same refactoring to all cases.

Fixed `stylelint-gitlab/duplicate-selectors` for `ee/app/assets/stylesheets/pages/projects.scss`

See merge request gitlab-org/gitlab-ee!14762

Resolve "Add interactive links in the Admin Area overview"

See merge request gitlab-org/gitlab-ce!29306

Update dependency @gitlab/ui to ^5.7.1

See merge request gitlab-org/gitlab-ce!31026

Correct an omitted word

See merge request gitlab-org/gitlab-ce!31083

Add notes to the docs about setting service variables for users wanting to do so from the UI

See merge request gitlab-org/gitlab-ce!30863

Regenerate broken locale/gitlab.pot

See merge request gitlab-org/gitlab-ee!14813

Fix duplicated suggestion in Danger gem warning

See merge request gitlab-org/gitlab-ce!31088

Introduces new `feature_entry` helper for dashboard.
This helper reduces code duplication when listing available features
and relevant links to configuration sections

Remove beta from group and instance clusters

See merge request gitlab-org/gitlab-ce!31059

Drop default rule_type when creating project approval rules

See merge request gitlab-org/gitlab-ee!14790

Project approval rules already have a default column `rule_type` set &
shouldn't require an explicit one.

This actually interferes with `ApprovalRules::CreateService` which
assumes an explicitly passed `rule_type` should be set by using a
`#reverse_merge`.  By dropping the forced default we can roll out a more
gradual frontend update to trigger this behavior rather than require
changes on both the backend and frontend

Add empty chart component

Closes #60947

See merge request gitlab-org/gitlab-ce!30682

This merge request adds an empty chart component
which will load in case of queries not having
data to display, this will override the current
logic, which hides all the graphs that have no
data to show

Do not send CI quota notifications when quota is unlimited

Closes #12998

See merge request gitlab-org/gitlab-ee!14810

Add GitLab Unix shell scripting style guide to docs

See merge request gitlab-org/gitlab-ce!30271

Set DOCKER_TLS_CERTDIR in CI job templates

See merge request gitlab-org/gitlab-ce!31080

Set DOCKER_TLS_CERTDIR in Auto Dev-Ops CI template

See merge request gitlab-org/gitlab-ce!31078

Don't send CI usage email notifications for self-hosted instances

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

Notifications should be only sent for GL.com customers.

https://gitlab.com/gitlab-org/gitlab-ce/issues/65019

https://gitlab.com/gitlab-org/gitlab-ce/issues/65019

Fixes #29528, by allowing all users to view history

Closes #29528

See merge request gitlab-org/gitlab-ce!30470

This removes the create_wiki permission check from the history
controller, allowing show and history to have the same level of
permissions.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/29528