fix(Core/Movement): (#7008)

- Get zone/area IDs from vmap data in the liquid update
- Add new method Map::getFullVMapDataForPosition to get area info and liquid info in a single vmap lookup
- Adjust GetZoneId/GetAreaId on WorldObject to always return these cached fields.
- Clean up liquid state handling on Unit and Player
- Implemented getting area id from gameobject spawns.
- Removed old core related to getting movement flags dependent on environment.
- Movement flags are now processed more precisely and dynamically.

Original source: TrinityCore.

- Closes #5086
- Updates #2208.

src/server/game/Entities/Player/PlayerStorage.cpp

@@ -5241,6 +5241,8 @@ bool Player::LoadFromDB(ObjectGuid playerGuid, CharacterDatabaseQueryHolder cons
     SetMap(map);
     StoreRaidMapDifficulty();
 
+    UpdatePositionData();
+
     SaveRecallPosition();
 
     time_t now = time(nullptr);
@@ -5772,7 +5774,7 @@ void Player::_LoadInventory(PreparedQueryResult result, uint32 timeDiff)
 
     if (result)
     {
-        uint32 zoneId = GetZoneId(true);
+        uint32 zoneId = GetZoneId();
 
         std::map<ObjectGuid::LowType, Bag*> bagMap;                 // fast guid lookup for bags
         std::map<ObjectGuid::LowType, Item*> invalidBagMap;         // fast guid lookup for bags