auth: Make full_name_validated attr of generic OIDC configurable.

This will be useful for deployments that want to just use the full name
provided by the IdP and thus skip the registration form. Also in
combination with disabling name changes in the organization, can force
users to just use that name without being able to change it.

zproject/default_settings.py

@@ -99,6 +99,7 @@ SOCIAL_AUTH_APPLE_EMAIL_AS_USERNAME = True
 
 # Generic OpenID Connect:
 SOCIAL_AUTH_OIDC_ENABLED_IDPS: Dict[str, Dict[str, Optional[str]]] = {}
+SOCIAL_AUTH_OIDC_FULL_NAME_VALIDATED = False
 
 # Other auth
 SSO_APPEND_DOMAIN: Optional[str] = None