qemu: Use '-machine acpi=on/off' instead of deprecated '-no-acpi'

QEMU deprecated the '-no-acpi' option, thus we should switch to the
modern way to use '-machine'.

Certain ARM machine types don't support ACPI. Given our historically
broken design of using '<acpi/>' without attribute to enable ACPI and
qemu's default of enabling it without '-no-acpi' such configurations
would not work.

Now when qemu reports whether given machine type supports ACPI we can do
a better decision and un-break those configs. Unfortunately not
retroactively.

Resolves: https://gitlab.com/libvirt/libvirt/-/issues/297
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

tests/qemuxml2argvdata/virtio-options-input-packed.x86_64-latest.args

@@ -10,7 +10,7 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -name guest=QEMUGuest1,debug-threads=on \
 -S \
 -object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
--machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram \
+-machine pc,usb=off,dump-guest-core=off,memory-backend=pc.ram,acpi=off \
 -accel tcg \
 -cpu qemu64 \
 -m 214 \
@@ -25,7 +25,6 @@ XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
 -mon chardev=charmonitor,id=monitor,mode=control \
 -rtc base=utc \
 -no-shutdown \
--no-acpi \
 -boot strict=on \
 -device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
 -device '{"driver":"virtio-mouse-pci","packed":true,"id":"input0","bus":"pci.0","addr":"0x2"}' \