* master: (301 commits)
  added missed commit in rebase
  update Grape routes to work with current version of Grape
  adds changelog
  fixes cursor issue on pipeline pagination
  Use random group name to prevent conflicts
  List all groups/projects for admins on explore pages
  Fix indentation
  More backport
  Fix filtered search user autocomplete for gitlab instances that are hosted on a subdirectory
  Fixed variables_controller_spec.rb test
  Backport of the frontend view, including tests
  Updated the #create action to render the show view in case of a form error
  Improved code styling on the variables_controller_spec
  Added tests for the variables controller #update action
  Added a variable_controller_spec test to test for flash messages on the #create action
  Modified redirection logic in the variables cont.
  Added redirections to the index actions for the variables and triggers controllers
  Added a flash message to the creation of triggers
  Fixed tests, renamed files and methods
  Changed the controller/route name to 'ci/cd' and renamed the corresponding files
  ...

Update Grape routes to work with current version of Grape

See merge request !8992

Disallow system notes for closed issuables

Closes #19262

See merge request !8848

Resolve "Mouse text cursor above pagination elements"

Closes #26920

See merge request !9003

Merge branch '26165-combine-runners-and-variables-and-triggers-and-ci-cd-pipelines-settings-pages' into 'master'

Merge Triggers, Runners, Variables and Pipelines to a single option called "CI/CD Pipelines"

Closes #26165

See merge request !8430

add the stewardship label to contributing.md

See merge request !8997

Backport changes from gitlab-org/gitlab-ee!998

See merge request !8984

Fix filtered search user autocomplete for gitlab instances that are hosted on a subdirectory

Closes #27343

See merge request !8891

Remove lighter colored commit description border

See merge request !9005

Use vue.js Pipelines table in commit and merge request view

Closes #27141

See merge request !8844

Also updated the #update action inside the variables controller as
to render the show and not redirect back to the settings route

Redirections now show a flash message wether the variable was created correctly or not using a flash message

Added tests to verify the access policy to the new controller

Added test for the CiCdPipelinesController

Skip or retain project while deleting the project:

Closes #15005

See merge request !8960

Don't delete assigned MRs/issues when user is deleted

See merge request !8634