E2E tests: Investigate inconsistent navigation timeouts

[joemcgill]

Recently, our automated end-to-end (E2E) tests have been failing inconsistently due to a Navigation Timeout error:

TimeoutError: Navigation timeout of 30000 ms exceeded

You can see an example of this type of error in ​a recent run of the workflow against on a PR to update the About Page, which should not have any affect on E2E tests.

The full list of runs where you can see this happening inconsistently, but frequently, is here: ​https://github.com/WordPress/wordpress-develop/actions/workflows/end-to-end-tests.yml

Often rerunning these failing jobs fixes the issue, but we should investigate why this is happening and try to reduce the frequency if possible since it leads to a poor experience and unnecessary overhead to rerun these failing jobs.

[mukesh27]

Duplicate of #58592.