qubes-builder issues

Make prepare-chroot-dom0 depend on builder.conf

What is not done is actually blow away the existing chroot. This is likely to require some rework, but at least the target is phony now.

Rudd-O

Fix non-verbose logging on make target `prepare-chroot-dom0`

The variable is not properly being set in the context of the shell interpreter running the `make` command.

Rudd-O

Added dependency to which for rpm bases systems

`make qubes` does not work without `which` installed when building fc32 ``` Currently installed dependencies: createrepo_c-0.20.1-1.fc36.x86_64 createrepo_c-0.20.1-1.fc36.x86_64 debootstrap-1.0.127-1.fc36.noarch devscripts-2.22.1-1.fc36.x86_64 dialog-1.3-41.20220117.fc36.x86_64 dpkg-dev-1.21.9-1.fc36.noarch git-2.37.3-1.fc36.x86_64 perl-Digest-MD5-2.58-479.fc36.x86_64 perl-Digest-SHA-6.03-1.fc36.x86_64 python3-pyyaml-6.0-3.fc36.x86_64 python3-sh-1.14.2-4.fc36.noarch rpm-build-4.17.1-3.fc36.x86_64 rpmdevtools-9.6-1.fc36.noarch systemd-container-250.8-1.fc36.x86_64 make[1]:...

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