Skip kernel-irqchip=off when installing with --install-from-img

Move the setting from qemu/windows11-darwin-arm64.ini to a -machine option
that run-windows11.py adds on macOS arm64 unless --install-from-img is given.
The workaround is only needed for usb-storage, which the NVMe install disk
does not use, and Setup hangs with the emulated interrupt controller.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

run-windows11.py

@@ -461,6 +461,14 @@ qemu_args += [
     "-display", display_backend,
     # "-display", "none", "-spice", "port=5900,addr=127.0.0.1,disable-ticketing=on,agent-mouse=off", "-device", "virtio-vga",
 ]
+if host_os == "darwin" and host_arch == "arm64" and not install_from_img:
+    # With the HVF in-kernel GICv3, QEMU's usb-storage races on the status
+    # packet and Windows Setup stalls 10 s after every burst of reads
+    # (utmapp/UTM#7970), so use the emulated interrupt controller; upstream
+    # QEMU only gets the fix from the UTM fork. The NVMe install disk of
+    # --install-from-img does not use usb-storage, and hangs with the emulated
+    # controller.
+    qemu_args += ["-machine", "kernel-irqchip=off"]
 if installing_from_iso:
     # q35 has IDE for the installation media; "virt" does not, so use USB.
     for media_id, media_file, boot_index, ide_bus in (