KVM: selftests: Use exception fixup for #UD/#GP Hyper-V MSR/hcall tests

Use exception fixup to verify VMCALL/RDMSR/WRMSR fault as expected in the
Hyper-V Features test.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220608224516.3788274-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>