Ensure that all actions are compared to fixed point in time (ie. world update start) (#18910)

- Actions will not be dependent on processing moment
- Increased GameObjects cooldown resolution to milliseconds, fixes arming time of traps to be exactly one second and not something from range (1000, 1999)
- Created GameTime namespace and UpdateTime class and moved there some code out of world

(cherrypicked from 7567cafec84080d26ea513242a1f540a823b8f9d)

src/server/scripts/Spells/spell_generic.cpp

@@ -26,6 +26,7 @@
 #include "Battleground.h"
 #include "CellImpl.h"
 #include "DB2Stores.h"
+#include "GameTime.h"
 #include "GridNotifiersImpl.h"
 #include "Group.h"
 #include "InstanceScript.h"
@@ -3589,7 +3590,7 @@ class spell_gen_turkey_marker : public SpellScriptLoader
             void OnApply(AuraEffect const* aurEff, AuraEffectHandleModes /*mode*/)
             {
                 // store stack apply times, so we can pop them while they expire
-                _applyTimes.push_back(getMSTime());
+                _applyTimes.push_back(GameTime::GetGameTimeMS());
                 Unit* target = GetTarget();
 
                 // on stack 15 cast the achievement crediting spell
@@ -3603,7 +3604,7 @@ class spell_gen_turkey_marker : public SpellScriptLoader
                     return;
 
                 // pop stack if it expired for us
-                if (_applyTimes.front() + GetMaxDuration() < getMSTime())
+                if (_applyTimes.front() + GetMaxDuration() < GameTime::GetGameTimeMS())
                     ModStackAmount(-1, AURA_REMOVE_BY_EXPIRE);
             }