Added role reference support in the scope

• Added granularity and role property; so that either a role or permission can be set • Removed deprecated simple_oauth_extra submodule • Improved code with return types

Closes #3283821

config/schema/simple_oauth.schema.yml

@@ -39,9 +39,15 @@ simple_oauth.oauth2_scope.*:
     parent:
       type: string
       label: 'Parent'
+    granularity:
+      type: string
+      label: 'Granularity'
     permission:
       type: string
       label: 'Permission'
+    role:
+      type: string
+      label: 'Role'
     langcode:
       type: string
       label: 'Language code'