Core/RBAC: Add config option to set comma separated list of groups to add by default
- Allows to reduce the rows in rbac_account_groups
Core/Vehicles: Fix a few issues

- Fix position desync issue
Closes #9073
- Fix a crash related to passenger's EventProcessor, thanks to Shauren
- Fix crash related to charminfo
- Make compiler happier about certain things
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore