Core/Quests: Remove CastedCreatureOrGO method

- Remove EAI's ACTION_T_CAST_EVENT and ACTION_T_CAST_EVENT_ALL
- Remove SAI's SMART_ACTION_CALL_CASTEDCREATUREORGO
- Split QUEST_TRINITY_FLAGS_KILL_OR_CAST into QUEST_TRINITY_FLAGS_KILL and QUEST_TRINITY_FLAGS_CAST
- Assign QUEST_TRINITY_FLAGS_CAST to all the quests that were using RequiredSpellCastX
- (unrelated) Fix a warning in Player.cpp
- Replace CastedCreatureOrGO usage in scripts by KilledMonsterCredit

TODO: Convert the two EAI scripts commented out in the .sql to proper SAI

Closes #10667

src/server/game/AI/SmartScripts/SmartScriptMgr.h

@@ -417,7 +417,7 @@ enum SMART_ACTION
     SMART_ACTION_EVADE                              = 24,     // No Params
     SMART_ACTION_FLEE_FOR_ASSIST                    = 25,     // With Emote
     SMART_ACTION_CALL_GROUPEVENTHAPPENS             = 26,     // QuestID
-    SMART_ACTION_CALL_CASTEDCREATUREORGO            = 27,     // CreatureId, SpellId
+    // none                                         = 27,
     SMART_ACTION_REMOVEAURASFROMSPELL               = 28,     // Spellid, 0 removes all auras
     SMART_ACTION_FOLLOW                             = 29,     // Distance (0 = default), Angle (0 = default), EndCreatureEntry, credit, creditType (0monsterkill, 1event)
     SMART_ACTION_RANDOM_PHASE                       = 30,     // PhaseId1, PhaseId2, PhaseId3...
@@ -627,12 +627,6 @@ struct SmartAction
             uint32 dec;
         } incEventPhase;
 
-        struct
-        {
-            uint32 creature;
-            uint32 spell;
-        } callCastedCreatureOrGO;
-
         struct
         {
             uint32 spell;