utils: reimplement RunVMIAndExpectLaunchWithIgnoreWarningArg
utils: reimplement RunVMIAndExpectLaunchWithIgnoreWarningArg

RunVMIAndExpectLaunchWithIgnoreWarningArg has a bool argument, which
exposes the fact that it has two distict functions:
RunVMIAndExpectLaunch() and RunVMIAndExpectLaunchWithIgnoreWarning().

As a step before eliminating RunVMIAndExpectLaunchWithIgnoreWarningArg,
this commit uses the existing functions that do it actions.

Signed-off-by: Dan Kenigsberg <184831158ae7531bcabc22617ed51e8717c81e93@redhat.com>

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