Updated swarm pet AI to be consistent with live.

*OLD AI: Swarm pet would lock on to target until target died, then depop as soon as target died.

*NEW AI: Swarm pet will attack cast on target, NOT perma locked it can change targets if attacked
by something else that generate more hate. When target dies swarm pet will follow owner, if owner is
attacked by something else the swarm pet will attack it (until duration timer despawns the pet).

Updated perl quest function: MakeTempPet(Tspell_id, name=nullptr, duration=0, target=nullptr, sticktarg=0)
Implemented perl quest function:  Mob::TypesTempPet(npctypesid, name=nullptr, duration=0, follow=0, target=nullptr, sticktarg=0)
Note: 'sticktarg' field will cause the swarm pet to use the OLD AI

Rule to use OLD AI only - default is disabled.
Optional SQL: utils/sql/git/optional/2014_11_15_SwarmPetTargetLock.sql