Partly revert 8edf6247c087884acd8c873a57c6f414e19091ec

This wasnt the correct way to fix trinkets and talents that should proc on periodic heals, as it also made talents that procs off spells with casttime proc...
Mentioned are affected, but there is a potential fix in:
https://github.com/TrinityCore/TrinityCore/issues/1896

NOTE to self: learn to use the proc_flag table