Add option to repeat tests

[tezc]

1- First commit adds --repeat option to pytest, to run a test 10 times:
pytest test.py --repeat 10

2- Second commit adds a github action argument for the daily build,
we can set additional pytest args from Github:
-k lua --repeat 10 : If test name matches lua, run it 10 times.

This is useful when we want to run a test many times to reproduce an issue or to fix a flaky test.