Enable OAuth for origin

[haoming29]

We have OAuth as an option for the registry and we want to enable the same feature for the origin as well

[haoming29]

Along with this ticket, we want to support other auth provider(s) in addition to CILogon. One provider we do want to support is Globus.

Make the oauth option optional for the origin too

[haoming29]

@bbockelm It seems like Globus does not support device auth flow: https://docs.globus.org/api/auth/reference/#obtaining_authorization_supported_oauth2_grant_types So the registry may be unable to use it as the auth server. Do you want us to integrate Globus for the origin only?

[bbockelm]

That is unfortunate - yes, let's keep it for web-only workflows then.