Corrects the logic for dot/hot procs and fixes spells such as althor's abacus, egg of mortal essence, black magic, spiritual attunement etc etc.
Reverts the remaining part of 8edf6247c0
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