kola/tests/etcd: disable on qemu
kola/tests/etcd: disable on qemu

Broken by 8ae5c680 because the qemu platform code doesn't handle
ignition configs properly yet.

marineam/mantle,quantum/coreos-mantle,quantum/coreos-mantle,dm0-/mantle,glevand/coreos--mantle,glevand/coreos--mantle,marineam/mantle,dm0-/mantle