Core/Wintergrasp: Fix typo in CMSG_HEARTH_AND_RESURRECT handler

Fix CMSG_HEARTH_AND_RESURRECT handler trying to resurrect players with 100x hp/mana/energy ( SetHealth()/SetPower() were sanitizing the input anyway ) .
Core/Battlegrounds: Fix offline players not being resurrected when Battleground ends

Fixes #7081
Core/Entities: Implement SMSG_INVALIDATE_PLAYER
Core/Entities: Don't allow to login while character is forced to rename
Merge pull request #11427 from Dehravor/force-rename

Core/Entities: Don't allow to login while character is forced to rename
Merge pull request #11426 from Dehravor/invalidate-player

Core/Entities: Implement SMSG_INVALIDATE_PLAYER