Ensure `openid_credential` is one of `authorization_details_types_supported` on the Authorization Server metadata well-known endpoint

### Description

Sending `authorization_details` now requires that oauth server metadata include `authorization_details_types_supported` that contains `openid_credential`.

Ref: https://openid.net/specs/openid-4-verifiable-credential-issuance-1_0-final.html#name-credential-issuer-metadata-p