In the certains situation customers using tools like Authentik or
Zitadel may encounter issue with using id_token as in that case it may
also return access_token despite not set deliberately
The `code` flow is now the preffered approach for OIDC hence
the ability for setting that options gives more flexibility.
Implements: oidc-response-type option
Closes-Bug: #2084184
Change-Id: I251dffbdf97998998066d5efd2d8d9386ecd19e5
7e375d1fb8