Improve suggestions
Improve suggestions

Many small improvements to the fix suggestions, including a better
support of Not() and negative checks in general; e.g.

`Should(BeNumeric(">", 0))` ==> `ShouldNot(BeEmpty())`

Signed-off-by: Nahshon Unna-Tsameret <d2a35840b61a4cf34917e887f4c10555349f04a7@redhat.com>

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