Feature: measure test execution time

[atodorov]

I don't even know if this is possible but would be a good thing to have so we can update the results with this info.

[atodorov]

https://docs.pytest.org/en/7.1.x/reference/reference.html?highlight=hook#pytest.hookspec.pytest_report_teststatus
https://docs.pytest.org/en/7.1.x/reference/reference.html?highlight=hook#pytest.TestReport.duration

Note: I think the hook is called 3 times: setup/call/teardown so the total execution time needs to be calculated.