tests: increase test coverage for KV control plane pods placement
tests: increase test coverage for KV control plane pods placement

Recently an admission control for Kubevirt CR was expanded
to validate correctness of workload and infra pod placement.
With respect to this addition a new negative tests were added
to the virt-operator test suite in order to cover the incorrect
configuration validation.

Signed-off-by: Igor Bezukh <9113621149c2d8e5a2b31fa2465615555ce2087b@redhat.com>

kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt