Draft: Update vscode E2E spec - accounting for open-web-ide-new-tab

What does this MR do and why?

Need to update our E2E specs with the slight change behaviour of the web ide opening to a new tab which is essentially:

Add to vscode.rb

page.driver.browser.switch_to.window(page.driver.browser.window_handles.last)
wait_for_requests

Screenshots or screen recordings

How to set up and validate locally

bundle exec bin/qa Test::Instance::All http://gdk.test:3000/ qa/specs/features/browser_ui/3_create/web_ide_new/add_new_directory_in_web_ide_spec.rb

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #383865 (closed)