This adds new columns to the wh_user_dimension to provide additional
data from OIDC that does not apply to Password Auth.
Note: Given the specifics of the data, it is possible these columns may
be used by other auth methods in the future, hence the lack of `oidc` in
the column names.
The specific columns are:
- auth_method_external_id
For OIDC this is the Issuer
- auth_account_external_id
For OIDC this is the Subject
- auth_account_full_name
For OIDC this is the account's Full Name, and can be `None`.
- auth_account_email
For OIDC this is the account's Email, and can be `None`.
For all of these new columns, they will be `Not Applicable` if the auth
method is Password.