Scripts/Commands: Replace regex usage

Sorry for the shitty C code but std::regex is not supported by GCC 4.7 and 4.8
DB/Misc Greatmother Geyah

Now as have sniffed all the gossip menu ids for this moving script for Greatmother Geyah to db, and the current script started not working correctly sometime ago ie failing to display npc_text (only options)

* Adds all gossip options to db
* SAI to complete both quests from gossip
* Missing npc_texts
Remove CPP Script 

Remove Greatmother Geyah's CPP Script
Scripts/Commands: Fix up logic at group join command, so it doesn't return full group error when it actually isn't full
Merge pull request #13004 from Nyeriah/pr-cmd

Scripts/Commands: Fix up logic at group join command, so it doesn't retu...
Core/Spells: Added better log output for "npc_spellclick_spells"
Core/Quests: Add methods to get a list of npcs/GOs that end (involved relation) a given a quest
Core/Spells: Screams of the Dead's (51750) duration shouldn't be affected by diminishing returns
DB/Creature: Revert faction of Fizzle Darkstorm to 3.3.5a

He is dead on 4.x and higher. Closes #13015