Skip flaky stream_async_components_for_testing RSpec test

This test has been replaced by more reliable Playwright E2E tests in
e2e-tests/streaming.spec.ts. The RSpec test was flaky and unreliable
for testing streaming behavior.

Related commit: b73ff63 "Replace streaming flaky tests with Playwright E2E tests"

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: justin808

react_on_rails_pro/spec/dummy/spec/system/integration_spec.rb

@@ -422,7 +422,8 @@ def change_text_expect_dom_selector(dom_selector, expect_no_change: false)
   end
 end
 
-describe "Pages/stream_async_components_for_testing", :js do
+describe "Pages/stream_async_components_for_testing", :js,
+         skip: "Flaky test replaced by Playwright E2E tests in e2e-tests/streaming.spec.ts" do
   it_behaves_like "streamed component tests", "/stream_async_components_for_testing",
                   "#AsyncComponentsTreeForTesting-react-component-0"
 end