Add new optional `OIDCDisableUserInfo` setting for OIDC auth provider which
disables a request to the identity provider to get OIDC UserInfo.
This option is helpful when your identity provider doesn't send any additional
claims from the UserInfo endpoint, such as Microsoft AD FS OIDC Provider:
> The AD FS UserInfo endpoint always returns the subject claim as specified in the
> OpenID standards. AD FS doesn't support additional claims requested via the
> UserInfo endpoint
Fixes#19318
Lower cased the title and headings in line with our company-wide style since this is being linked in an upcoming blog I was editing. I also lowercased words such as "Auth Method" and other primitives/components when mentioned in prose - this is in line with our style guide as well where we don't capitalize auth method and we only capitalize components that are SKU/product-like in their separateness/importance.
https://docs.google.com/document/d/1MRvGd6tS5JkIwl_GssbyExkMJqOXKeUE00kSEtFi8m8/edit
Adam Trujilo should be in agreement with changes like this based on our past discussions, but feel free to bring in stake holders if you're not sure about accepting and we can discuss.
