Prevent admin-frozen players from ghosting or suiciding, add "Freeze And Mute" verb (#27813)

* prevent admin-frozen players from ghosting or suiciding

* Add "Freeze and Mute" admin verb

* Allow "Freeze And Mute" admin verb when player is already frozen but not muted

* Remove redundant scream handler (scream action just emotes, duh)

* AdminFrozenSystem: clean imports

* Update Content.Server/Chat/Commands/SuicideCommand.cs

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

* Update Ghost.cs

* retrigger ci (empty commit)

---------

Co-authored-by: metalgearsloth <31366439+metalgearsloth@users.noreply.github.com>

Content.Server/Administration/Systems/AdminFrozenSystem.cs

@@ -0,0 +1,16 @@
+using Content.Shared.Administration;
+
+namespace Content.Server.Administration.Systems;
+
+public sealed class AdminFrozenSystem : SharedAdminFrozenSystem
+{
+    /// <summary>
+    /// Freezes and mutes the given entity.
+    /// </summary>
+    public void FreezeAndMute(EntityUid uid)
+    {
+        var comp = EnsureComp<AdminFrozenComponent>(uid);
+        comp.Muted = true;
+        Dirty(uid, comp);
+    }
+}