OpenSUSE 15.6 and SLES 15 SP6 seem to need direct configuration
for git and curl to take CA certificates into use. [CI Platforms]
Includes fix to install gstreamer h264 codec
(amending 58e0090020)
Task-number: QTQAINFRA-6740
Task-number: QTQAINFRA-6739
Change-Id: I0d92ef50527564d2f048174777e20d1611aaf4d2
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Tero Heikkinen