refactor: API: Add AuthMethodOIDC class to hold static states

ui/admin/app/controllers/scopes/scope/auth-methods/auth-method.js

@@ -1,4 +1,5 @@
 import Controller from '@ember/controller';
+import { AuthMethodOIDC } from 'api/classes/auth-method';
 
 export default class ScopesScopeAuthMethodsAuthMethodController extends Controller {
   // =attributes
@@ -10,4 +11,12 @@ export default class ScopesScopeAuthMethodsAuthMethodController extends Controll
   get breadCrumb() {
     return this.model.displayName;
   }
+
+  /**
+   * OIDC auth-method states
+   * @type {[string]}
+   */
+  get oidcStates() {
+    return AuthMethodOIDC.states;
+  }
 }