pip install webdriver-manager and chromedriver and chromium packages should be version-locked

There's a problem with webdriver-manager during provisioning that was found while trying to merge this CR https://codereview.qt-project.org/c/qt/qt5/+/575510

EDIT by jimis: It has failed repeatedly several times already. Here is what I believe is going on:

1. pip install webdriver-manager during provisioning is successful (provisioning is green)
2. zypper install chromium chromedriver is also successful.
3. That latest version of webdriver-manager in combination with the version of chrome, trigger a bug in the testing stage

The main bug here is that we haven't locked down the versions of webdriver-manager and chromedriver and chromium, but we always install the latest.