job runners fail to update dependencies on new machine

This the jobrunner are executed on raoul, they fail: https://gitlab.orfeo-toolbox.org/s1-tiling/s1tiling/-/jobs/41133

$ curl https://bootstrap.pypa.io/get-pip.py --output get-pip.py
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:02:09 --:--:--     0curl: (7) Failed to connect to bootstrap.pypa.io port 443: Connection timed out

It's likely related to fetching pip behind a corporate firewall: https://stackoverflow.com/questions/50701322/unable-to-install-pip-behind-a-corporate-firewall