rpm-ostree install behavior change -> update tests

[dustymabe]

For at least the ext.config.extensions.package test (there may be others):

Dec 08 16:50:29 qemu0 kola-runext-package[2091]: ++ jq -r '.deployments[0]["base-commit-meta"]["fedora-coreos.stream"]'
Dec 08 16:50:29 qemu0 kola-runext-package[2088]: + rpm-ostree install --apply-live gdb htop strace tcpdump tree crio
Dec 08 16:50:29 qemu0 kola-runext-package[2098]: notice: auto-inferring -y/--assumeyes when not run interactively; this will change in the future

Let's update the command invocation to include -y.