Add Group and Raid method DoesAnyMemberHaveExpeditionLockout
This is required by some expeditions that perform a manual check for
custom dialogue (Ikkinz group expeditions)
This still doesn't add support for /autosplit in a raid, how should that
work?
This changes the Raid::SplitMoney to take a group ID and fails when
provided with RAID_GROUPLESS. This does change behavior, but I'm not
sure if it was ever used so ...