[turbopack] Add E2E tests for service workers (#94924)
This PR adds E2E test for the new service worker syntax introduced in
https://github.com/vercel/next.js/pull/94923. The tests do the
following:
`service-worker-multiple` tests that you can not have multiple service
workers with the same scope. this is because their file names would
clash; additionally, this is generally a bad practise.
`service-worker-scopes` tests that you register multiple service workers
with different scopes and they will be different files
`service-worker` tests that service workers work when registered using
the new syntax.
