KVM: VMX: Don't kill the VM on an unexpected #VE

Don't terminate the VM on an unexpected #VE, as it's extremely unlikely
the #VE is fatal to the guest, and even less likely that it presents a
danger to the host.  Simply resume the guest on "failure", as the #VE info
page's BUSY field will prevent converting any more EPT Violations to #VEs
for the vCPU (at least, that's what the BUSY field is supposed to do).

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-ID: <20240518000430.1118488-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>