Intermittent ElementHandle.click() timeout error

[imiric]

Running the same test script from #510, on current main (db80f94), and mostly only reproducible in the Cloud, we sometimes see the following error:

clicking on "a[href=\"/my_messages.php\"]": timed out after 30s
	at reflect.methodValueCall (native)
	at file:///tmp/PvwCGT/script.js:44:17(46)
	at native
 executor=constant-vus scenario=default		test_run_id: 141246

The effect is that there's a pause in execution while we wait for the default 30s tmeout, as documented in #502, and the iteration ends abruptly. This is probably another race condition between ElementHandle.click() and Page.waitForNavigation().

[imiric]

After #555, we no longer see this issue in the Cloud 🎉 So I'm closing this.