OpenID Connect StandardClientRegistrationProvider scopes should be configurable

We're integrating our NiFi instance with OpenID Connect. We didn't have an issue on version 1.19.1.

When we get redirected from /nifi-api/oauth2/authorization/consumer, the link includes all supported scopes found at the nifi.security.user.oidc.discovery.url. In our case, there are a lot and this causes an HTTP 414 (uri too long). Generally not a good idea to do this, because the list can be very long.

Scopes of the client registration should be configurable, currently it is only possible to add scopes. We should be able to fully configure them.

Classified as bug because situation is not workable.