fix: wait for playwright fixture to setup before running test (#66842)
### What?
Sometimes, probably when you have a lot of tests, I've noticed that some
tests are failing with the error `browserContext.route: Test ended`.
After some debugging I found that `page.route(…)` needs to be awaited
before continuing.
### Why?
So that Playwright works correctly with the `next` fixture.
Co-authored-by: JJ Kasper <jj@jjsweb.site>