Core/Players: Dungeon Finder quest rewards should be sent as a mail if the player's inventory happens to be full

Thanks @dr-j for the sniffed texts
Merge pull request #12951 from Nyeriah/patch-dfq

Core/Players: Dungeon Finder quest rewards should be sent as a mail if t...
Core/Player: Dungeon Finder quests don't follow the same rule as repeatable quests, they should award experience every time they're rewarded
DB/Creature: Fix more factions
Merge pull request #12952 from Nyeriah/patch-dfq

Core/Player: Dungeon Finder quests don't follow the same rule as repeata...
DB/Creature: Add trigger and civilian flags to the other difficulty entries of the Soul Consumption trigger

By Nyeriah, closes #12957