* Finally this commit enables dynamic script hotswapping
and finished the PR #15671.
* Split the storage layout to use optimized storages
for database bound and unbound scripts.
* Add several unload workers to reload scripts correctly
-> Requires further investigation.
* Fixes memory leaks in ScriptMgr when dropping invalid scripts.
* Fixes VehicleScripts
* Makes OutdoorPvP scripts reloadable
* Makes InstanceMapScripts reloadable
* Makes CommandScripts reloadable