fix: add emoji when regression tests timeout

[kostasrim]

I had a very good reason why I did not use the: https://pypi.org/project/pytest-timeout/ when I added timeouts. I quote

1. While by default on POSIX systems pytest will continue to execute the tests after a test has timed out this is not always possible.
2. pytest --timeout=300 only works for individual tests and not the whole session.

That was the very reason I opted in for timeout shell command

There is a simpler solution to warn against timeouts. Since we can use any emoji, we can have one dedicated for timeouts and scream that by printing it. This will come up at the end (next to the error message) so you can be aware that the tests timedout.

[kostasrim]

https://github.com/dragonflydb/dragonfly/actions/runs/7783655038/job/21222556440#step:6:595

Now it's clear :)