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

Closes #8103
Core/Misc: Fix coverity analysis issues
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
Core: Fix typo in 316d9a5ce89b1a21a22b4ef038d9c76e91e0e948
Core/Dependencies: Upgrade to jemalloc-3.6.0
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore into ghbb
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