DB/Creature: Spawn Thalorien Dawnseeker's remains

Closes #11017
Core/Players: Fixed trainers still displaying profession skills after learning

Closes #8103
Core/Misc: Fix coverity analysis issues
Core: Fix typo in 316d9a5ce89b1a21a22b4ef038d9c76e91e0e948
Core/Dependencies: Upgrade to jemalloc-3.6.0