Better timeout management in live tests

[rrrooommmaaa]

This PR adjusts timeouts

close #5035
close #5038

Tests (delete all except exactly one):

• Internal test changes

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To be filled by reviewers

I have reviewed that this PR... (tick whichever items you personally focused on during this review):

• addresses the issue it closes (if any)
• code is readable and understandable
• is accompanied with tests, or tests are not needed
• is free of vulnerabilities
• is documented clearly and usefully, or doesn't need documentation

[sosnovsky]

Looks good, but mail.google.com/chat test still fails

By the way, why in some cases we use waitUntil: 'load' and in other cases waitUntil: 'networkidle2'?

[rrrooommmaaa]

By the way, why in some cases we use waitUntil: 'load' and in other cases waitUntil: 'networkidle2'?

load is the default value and it's understandable -- the page has finished loading.
Using networkidle2 was an idea of @limonte, if I'm not mistaken. I don't know the reasoning (to save a couple of seconds?) It works both ways. I left networkidle2 in places where it was originally specified.