* Core/Metric: Add more metrics about World::Update() loop
* Add new Performance profiling grafana dashboard
* Add new cmake setting WITHOUT_METRICS that disables all metrics
As new metrics are added, someone might want to disable them if unused.
* Add more metrics about World::Update() loop
* Remove old performance profiling features
Remove "server set difftime" command, "-RecordUpdateTimeDiffInterval" and "MinRecordUpdateTimeDiff" worldserver config settings and their related code.
The whole UpdateTime class could be removed too.
* Update and rename 2020_07_99_99_world.sql to 2020_07_24_00_world.sql
(cherry picked from commit 3c0ac7302f)
- 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 7567cafec8)
