message: Update openid_credentials Widget API action for MSC1960 updates
  We now need to send a `state` and `original_request_id` per MSC1960's recent adjustments
diff: @@ -186,7 +186,14 @@ export default class WidgetMessaging {
  isUserWidget: this.isUserWidget,
  onFinished: async (confirm) => {
  - const responseBody = {success: confirm};
  + const responseBody = {
  + // Legacy (early draft) fields
  + success: confirm,
  +
  + // New style MSC1961 fields
  + state: confirm ? "allowed" : "blocked",
  + original_request_id: ev.requestId, // eslint-disable-line camelcase
  + };
  if (confirm) {
  const credentials = await MatrixClientPeg.get().getOpenIdToken();
  Object.assign(responseBody, credentials);
  