Fix lingering ghost roles (and expand tests to catch it) (#38788)

* Improve and expand `TakeRoleAndReturn` to fail on bug #38292

* fix #38292 and expanded test cases

* use validated EntProtoIds for tests

remove unusued using declarations

* use const strings that match the TestPrototypes

Content.Server/Ghost/Roles/GhostRoleSystem.cs

@@ -510,6 +510,11 @@ public sealed class GhostRoleSystem : EntitySystem
 
         DebugTools.AssertNotNull(player.ContentData());
 
+        // After taking a ghost role, the player cannot return to the original body, so wipe the player's current mind
+        // unless it is a visiting mind
+        if(_mindSystem.TryGetMind(player.UserId, out _, out var mind) && !mind.IsVisitingEntity)
+            _mindSystem.WipeMind(player);
+
         var newMind = _mindSystem.CreateMind(player.UserId,
             Comp<MetaDataComponent>(mob).EntityName);