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/Grids/NGrid.cpp

@@ -23,7 +23,7 @@ i_unloadActiveLockCount(0), i_unloadExplicitLock(false), i_unloadReferenceLock(f
 {
 }
 
-GridInfo::GridInfo(std::chrono::seconds expiry, bool unload /*= true */) : i_timer(expiry.count()), vis_Update(0, irand(0, DEFAULT_VISIBILITY_NOTIFY_PERIOD)),
+GridInfo::GridInfo(time_t expiry, bool unload /*= true */) : i_timer(expiry), vis_Update(0, irand(0, DEFAULT_VISIBILITY_NOTIFY_PERIOD)),
 i_unloadActiveLockCount(0), i_unloadExplicitLock(!unload), i_unloadReferenceLock(false)
 {
 }