Ghost roles create new minds, better tracking of roles at round end screen (#5175)

* Ghost roles now get new Minds

* Some round start/end button stuff

* Mind tracking for better round end reports

* Make traitor kill objectives use mind CharacterName rather than actual occupied entity ("kill brain" prevention)

* Transition over to EntityUid for mind stuff because that's the only way to do it

* BrainSystem fix for PR rebase

Content.Server/GameTicking/GameTicker.Player.cs

@@ -37,7 +37,7 @@ namespace Content.Server.GameTicking
                 {
                     // Always make sure the client has player data. Mind gets assigned on spawn.
                     if (session.Data.ContentDataUncast == null)
-                        session.Data.ContentDataUncast = new PlayerData(session.UserId);
+                        session.Data.ContentDataUncast = new PlayerData(session.UserId, args.Session.Name);
 
                     // Make the player actually join the game.
                     // timer time must be > tick length