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/common/Collision/Models/WorldModel.cpp

@@ -412,7 +412,6 @@ namespace VMAP
         {
             return false;
         }
-        GModelRayCallback callback(triangles, vertices);
         Vector3 rPos = pos - 0.1f * down;
         float dist = G3D::inf();
         G3D::Ray ray(rPos, down);
@@ -554,6 +553,7 @@ namespace VMAP
         groupTree.intersectPoint(p, callback);
         if (callback.hit != groupModels.end())
         {
+            info.rootId   = RootWMOID;
             info.hitModel = &(*callback.hit);
             dist = callback.zDist;
             return true;