Add ability for admins to change certain cvars via command. (#35105)

* Add ability for admins to change certain cvars via command.

* Cleanup

* More cleanup.

* Even more cleanup.

* WAITER! WAITER! ONE MORE COMMIT PLEASE!

* Remove requirement for Admin AdminFlag

Not needed as the command checks for the perms.

* Add search function to CVars and help text

* Move to controller instead.

* Add another cvar for testing

* Remove unused comment

* Move to Post Server Initialize

LoC does not work at the earlier stages of server initalization

* Remove unneeded comment

We clear out list so its no longer needed

Content.Server/Entry/EntryPoint.cs

@@ -153,6 +153,7 @@ namespace Content.Server.Entry
                 IoCManager.Resolve<IBanManager>().Initialize();
                 IoCManager.Resolve<IConnectionManager>().PostInit();
                 IoCManager.Resolve<MultiServerKickManager>().Initialize();
+                IoCManager.Resolve<CVarControlManager>().Initialize();
             }
         }