KVM: selftests: Write REPORT_GUEST_ASSERT macros to pair with GUEST_ASSERT

Write REPORT_GUEST_ASSERT macros to pair with GUEST_ASSERT to abstract
and make consistent all guest assertion reporting. Every report
includes an explanatory string, a filename, and a line number.

Signed-off-by: Colton Lewis <coltonlewis@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Link: https://lore.kernel.org/r/20220615193116.806312-4-coltonlewis@google.com


Signed-off-by: Sean Christopherson <seanjc@google.com>