tests: extract _test_direct_kernel_boot_noacpi wrapper

Extract test logic from test_direct_kernel_boot_noacpi into
a shared _test_direct_kernel_boot_noacpi wrapper function in
tests_wrappers.rs. The kernel cmdline modification (acpi=off)
is kept in the parent test case. The wrapper uses
default_kernel_cmdline() for kernel/cmdline setup.

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

cloud-hypervisor/tests/common/tests_wrappers.rs

@@ -2447,3 +2447,27 @@ pub(crate) fn _test_console_file(guest: &Guest) {
 
     handle_child_output(r, &output);
 }
+
+pub(crate) fn _test_direct_kernel_boot_noacpi(guest: &Guest) {
+    let mut child = GuestCommand::new(guest)
+        .default_cpus()
+        .default_memory()
+        .default_kernel_cmdline()
+        .default_disks()
+        .default_net()
+        .capture_output()
+        .spawn()
+        .unwrap();
+
+    let r = std::panic::catch_unwind(|| {
+        guest.wait_vm_boot().unwrap();
+
+        assert_eq!(guest.get_cpu_count().unwrap_or_default(), 1);
+        assert!(guest.get_total_memory().unwrap_or_default() > 480_000);
+    });
+
+    kill_child(&mut child);
+    let output = child.wait_with_output().unwrap();
+
+    handle_child_output(r, &output);
+}