tests: extract _test_dmi_uuid to tests_wrappers

Move the DMI UUID test logic from integration.rs into a
shared _test_dmi_uuid() function in tests_wrappers.rs.
The original test in integration.rs now uses the
basic_regular_guest macro and delegates to this shared
function, enabling reuse by CVM tests.

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

cloud-hypervisor/tests/common/tests_wrappers.rs

@@ -2210,3 +2210,32 @@ pub(crate) fn _test_dmi_serial_number(guest: &Guest) {
 
     handle_child_output(r, &output);
 }
+
+pub(crate) fn _test_dmi_uuid(guest: &Guest) {
+    let mut child = GuestCommand::new(guest)
+        .default_cpus()
+        .default_memory()
+        .default_kernel_cmdline_with_platform(Some("uuid=1e8aa28a-435d-4027-87f4-40dceff1fa0a"))
+        .default_disks()
+        .default_net()
+        .capture_output()
+        .spawn()
+        .unwrap();
+
+    let r = std::panic::catch_unwind(|| {
+        guest.wait_vm_boot().unwrap();
+
+        assert_eq!(
+            guest
+                .ssh_command("sudo cat /sys/class/dmi/id/product_uuid")
+                .unwrap()
+                .trim(),
+            "1e8aa28a-435d-4027-87f4-40dceff1fa0a"
+        );
+    });
+
+    kill_child(&mut child);
+    let output = child.wait_with_output().unwrap();
+
+    handle_child_output(r, &output);
+}