Updated options for QEMU on Windows hosts

Using "w" suffixed versions of QEMU binaries for correct background process
handling and not bind it to lifecycle of command prompt window. Stub for
arm64 version added to fix compilation issues of this target, when QEMU
machine will be finally enabled.

Signed-off-by: Arthur Sengileyev <arthur.sengileyev@gmail.com>

pkg/machine/qemu/options_windows_amd64.go

@@ -1,7 +1,7 @@
 package qemu
 
 var (
-	QemuCommand = "qemu-system-x86_64"
+	QemuCommand = "qemu-system-x86_64w"
 )
 
 func (v *MachineVM) addArchOptions() []string {

pkg/machine/qemu/options_windows_arm64.go

@@ -0,0 +1,19 @@
+package qemu
+
+var (
+	QemuCommand = "qemu-system-aarch64w"
+)
+
+func (v *MachineVM) addArchOptions() []string {
+	// stub to fix compilation issues
+	opts := []string{}
+	return opts
+}
+
+func (v *MachineVM) prepare() error {
+	return nil
+}
+
+func (v *MachineVM) archRemovalFiles() []string {
+	return []string{}
+}