The chromedp context was not cancelled, so resources may have been leaking.
Additionally this waits for the browser to start before the timer starts, and extends the timeout to 20 seconds.
Logging from chromedp has also been enabled, which may help identify possible issues?
These wasm tests weren't passing in GitHub Actions and also weren't
passing on my laptop. I'm not sure why, I think there are a few race
conditions that are going on.
This commit attempts to fix this at least to a degree:
- The context deadline is increased from 5 seconds to 10 seconds.
- The tests are not running in parallel anymore.
- Some `Sleep` calls were removed, they do not appear to be necessary
(and if they were, sleeping is the wrong solution to solve race
conditions).
Overall the tests are taking a few seconds more, but on the other hand
they seem to be passing more reliable. At least for me, on my laptop
(and hopefully also in CI).
