Fix build issue for openSUSE on CI, probably related to the
gstreamer-plugin-openh264 plugin being obsolete for the latest
gstreamer-plugins-bad package
https://forums.opensuse.org/t/gstreamer-plugins-bad-wants-to-obsolete-gstreamer-plugin-openh264/186318
GStreamer tests are disabled on openSUSE anyway atm.
Pick-to: 6.10 6.9 6.8
Change-Id: I6e19e655c8753de879d6bbf82e532d18b25a01cb
Reviewed-by: Tim Blechmann <tim.blechmann@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>