fix(Core/Grid): Address bugs and performance issues introduced by visibility notifier implementation (#17480)

* Bug fixes

- Corrected std::chrono from seconds to milliseconds
- Got rid of leftover code that caused objects to not show up on time

* Removed logic to set gameobject as active

- More alignement with TC.
- Reduces CPU usage drastically

* Revert back to using time_t instead of std chrono

* Invoke SetNoCreate() method to reduce CPU usage drastically

* Remove setActive from static and motion transports

* Fix performance issues

* Added SetFarVisible to WG and some dungeon scripts

- Also removed setActive(true) from creatures in Wintergrasp. As for gameobjects they are set to active upon being damaged/destroyed and removed from active on rebuild (reset)

* Removed comments related to VISIBILITY_COMPENSATION

* Fix log

* Deleted unused files + corrected a check

* Added missing header

* Removed unused parameter

* Removed another unsued parameter

* Changed vector to set for i_visibleNow

- Changed vector to set for i_visibleNow in VisibleNotifer
- Adjusted HaveAtClient to accept Object*
- Adjusted SendUpdateToPlayer to send createobject packet only if not known to client

src/server/game/World/World.cpp

@@ -44,7 +44,6 @@
 #include "DBCStores.h"
 #include "DatabaseEnv.h"
 #include "DisableMgr.h"
-#include "DynamicVisibility.h"
 #include "GameEventMgr.h"
 #include "GameGraveyard.h"
 #include "GameTime.h"
@@ -2255,8 +2254,6 @@ void World::Update(uint32 diff)
     // Record update if recording set in log and diff is greater then minimum set in log
     sWorldUpdateTime.RecordUpdateTime(GameTime::GetGameTimeMS(), diff, GetActiveSessionCount());
 
-    DynamicVisibilityMgr::Update(GetActiveSessionCount());
-
     ///- Update the different timers
     for (int i = 0; i < WUPDATE_COUNT; ++i)
     {