Skip cmd_unzip test if salt.utils.which('zip') isn't available (#36722)
Skip cmd_unzip test if salt.utils.which('zip') isn't available (#36722)

This test relies on running archive.cmd_zip in order to have something
to test running archive.cmd_unzip against. Some distros will have the
unzip binary available, but not the zip binary. We need to protect this
test against both so we don't have a false failure on trying to run
archive.cmd_zip.
saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt