hypervisor: implement pause/resume API for MSHV

Implementing pause/Resume API for MSHV.
Here we set/reset the partition property(TIME_FREEZE)

Signed-off-by: Muminul Islam <muislam@microsoft.com>

hypervisor/src/vm.rs

@@ -231,6 +231,10 @@ pub enum HypervisorVmError {
     ///
     #[error("Failed to complete isolated import: {0}")]
     CompleteIsolatedImport(#[source] anyhow::Error),
+    /// Failed to set VM property
+    ///
+    #[error("Failed to set VM property: {0}")]
+    SetVmProperty(#[source] anyhow::Error),
 }
 ///
 /// Result type for returning from a function