All tests pass on kvm.
`read_only_memory` test does not pass on whpx and haxm, there is a bug
tracking its resolution.
BUG=b:213151455
TEST=Ran `cargo test -p hypervisor` on linux.
Change-Id: Ieb8042c9eb964873b685437f94802fae83765a43
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/3739488
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Vaibhav Nagarnaik <vnagarnaik@google.com>
