Cleanup: Rename f_account functions in attempt to be easier to read.

Cleanup: Rename f_account functions in attempt to be easier to read.

I originally tried to group the logic by "name" and "id".
This becomes confusing when there is "group name" and "user name" or "group id" and "user id".
The function name with the structure "f_account_id_group_by_name" is intended to be understood as get id of group by name for account.
However, because account is in front (part of f_account) it could be easily misread as get account id by name with some spurious "group" injected.
This is clearly a bad interpretation but that interpretation is easy to think of.

Drop "user" because "account" and "user" should be synonymous.
Move "group" to the left in all cases to designate that this is about "group" associated with account.
Now f_account_group_id_by_name sounds more like get id of group by name for account.