nVMX: Add a non-reporting assertion macro

Add a version of VMX's TEST_ASSERT that doesn't report.  The output of
basic assertions is annoying, and other than inflating the number of
tests to make KUT look good, there's no value in reporting that KUT is
working as intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211125012857.508243-24-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>