Removal and Replacement of the CryTimer (gEnv->pTimer) (#5409)

Replaced and removed the CryTimer (gEnv->pTimer). The new TimeSystem is a merger of the current time functionality found in the engine.

* Rename TimeSystemComponent.h/.cpp to TimeSystem.h/.cpp
* Adding New TimeSystem
* remove old timer cvars
* small improvements to the time system.
 - updated parts to use the time conversion functions.
 - in AdvanceTickDeltaTimes applying t_simulationTickScale is now uses doubles instead of floats.
* Replace gEnv->pTimer / ITimer usages with TimeSystem
* Updating usages of AZ::TimeMs{ 0 } and AZ::TimeUs{ 0 } to AZ::Time::ZeroTimeMs and AZ::Time::ZeroTimeUs
* red code the CryTimer
* using TimeUs instead of TimeMs is some cases + updating usages of old cvars to new

Signed-off-by: amzn-sean <75276488+amzn-sean@users.noreply.github.com>

Gems/LmbrCentral/Code/Source/Scripting/RandomTimedSpawnerComponent.cpp

@@ -13,6 +13,7 @@
 #include <LmbrCentral/Scripting/SpawnerComponentBus.h>
 
 #include <AzCore/Component/TransformBus.h>
+#include <AzCore/Time/ITime.h>
 
 namespace LmbrCentral
 {
@@ -88,8 +89,8 @@ namespace LmbrCentral
 
     void RandomTimedSpawnerComponent::Activate()
     {
-        AZStd::chrono::system_clock::time_point now = AZStd::chrono::system_clock::now();
-        m_currentTime = AZ::ScriptTimePoint(now).GetSeconds();
+        const AZ::TimeUs elapsedTimeUs = AZ::GetElapsedTimeUs();
+        m_currentTime = AZ::TimeUsToSecondsDouble(elapsedTimeUs);
         RandomTimedSpawnerComponentRequestBus::Handler::BusConnect(GetEntityId());
 
         CalculateNextSpawnTime();