[BUG] checking infraction of person who left server results in User not found

[AquaXV]

Describe the bug When checking user infractions using ID it fails if the user already left the server

To Reproduce

1. grab ID of person who is no longer in the server and has infractions
2. do []infr USER_ID
3. see 'user not found'

Expected behavior The infraction fetching should fall back to directly check userdata if the SocketGuildUser could not found.