We build in Debian buster but were currently testing in bullseye-based
ramdisks. This has started being a problem since Python 3.7 was removed
from bullseye.
[ Also bumped arm_test containers, by anholt ]
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5433>