Since SERVER-113888 creating a 2dsphere index on a timeseries collection with a non-system user fails with error: "CannotCreateIndex: Index Type 2dsphere_bucket is for internal use only".

The issue seems to be that the create index command will first translate the index type from 2dsphere to 2dsphere_bucket and then later validate that indexes of type 2dsphere_bucket can only be created by a system user. So the validation sees the translated 2dsphere_bucket type rather than then 2dsphere that the user submitted.

A  reproducer is attached.