ci: do not install i386 sub-architecture in VK images
Not required by apitrace.
debian/x86_test-vk
image size:
previous: 1.8G
after: 1.0G
Tested: https://gitlab.freedesktop.org/okias/mesa/-/jobs/26129466
Also use apt-get instead of apt, see: https://unix.stackexchange.com/questions/590699/should-i-use-apt-or-apt-get-in-shell-scripting
Signed-off-by: David Heidelberg david.heidelberg@collabora.com