Allow vendors to be reviewed without selecting an authentication method

Currently in the Vendors review flow, selecting a login/authentication method is mandatory to mark a vendor as Reviewed.

However, not all vendors provide software or platforms that require authentication.

Context

Some vendors (e.g. law firms or consultants) do not offer any system requiring a login. In these cases, we are forced to select an incorrect authentication method just to complete the review.

Proposed solution

Add a “No authentication required / Not applicable” option that allows vendors to be marked as Reviewed without selecting a login method.