Add a couple of admin monitors for executors on the controller (#5337)

* Add a couple of admin monitors.

Warn against leaving executors configured on the controller, under two different scenarios.

* Add line endings.

* Update extension name and doc targets.

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>

* Make them security monitors.

* Improve UI / presentation.

* Remove permission checks.

Unnecessary.

* Make localizable.

* Add restricted annotations.

* Fix checkstyle error

* Use same message.

Co-authored-by: Daniel Beck <1831569+daniel-beck@users.noreply.github.com>
Co-authored-by: Raihaan Shouhell <raihaanhimself@gmail.com>