Scripts/TheBlackMorass: Fix first 7 rifts spawn timings

Partially revert 7e76ab97f895da1320106fad28e31d6b34c15443 to properly spawn first 7 rifts. Also allow only 1 EVENT_NEXT_PORTAL event at time.
Db/Disable: Sibling Rivalry credit

By @untaught fixes #11020
Scripts/Ahnkahet: Prince Taldaram rewritten to BossAI

Closes #10993
Core/Misc: Ugh.. Fix recent commit that broke the OnHeal hook :disappointed_relieved:
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
Fix build.
Fix non-pch build.
Inlcuded sniff. Thanks to Aokromes
Merge remote-tracking branch 'GitHub/master' into GitHub