* Mostly aimed at removing Log/DatabaseEnv includes from other headers
* Fix most packet headers including other packet headers - moved common structures such as ItemInstance to their own files
* Moved SAI function definitions to source files (massive or requiring many different dependencies)
Fix Vote Kick started with party in queue breaking the whole LFG queue. The status of Vote Kick is now storing in a bool variable in LfgGroupData, separated from LfgState of the group/members.
If a Vote Kick started with party in queue, the members were not removed from queue correctly and would cause LFG matching system to match these "broken" players but not allowing to start a dungeon.
Closes#10191
(cherry picked from commit 22403121fe)
