ANDROID: pkvm: vmx: Handle EPT_VIOLATION vmexit

For both pVM and npVM, share the GPA information with the host via the
exit_gpa field which will be used by the host to handle the EPT
violation vmexit.

Bug: 391539939
Test: pKVM works
Upstream-Task: 402758258

Change-Id: Ibab5e3e21f41e2ecbf90c624419797f9f3bce6ac
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.com>
Signed-off-by: Dmytro Maluka <dmaluka@google.com>