disable flaky suite (#55953)

Author: spalger

x-pack/plugins/spaces/server/lib/request_interceptors/on_post_auth_interceptor.test.ts

@@ -30,7 +30,8 @@ import { Feature } from '../../../../features/server';
 import { spacesConfig } from '../__fixtures__';
 import { securityMock } from '../../../../security/server/mocks';
 
-describe('onPostAuthInterceptor', () => {
+// FLAKY: https://github.com/elastic/kibana/issues/55953
+describe.skip('onPostAuthInterceptor', () => {
   let root: ReturnType<typeof kbnTestServer.createRoot>;
   jest.setTimeout(30000);