acpi/tests/avocado/bits: disable smilatency tests

acpi/tests/avocado/bits: disable smilatency tests

smilatncy tests in bios bits seems to generate some flakyness in running the
bits avocado tests. Disable them for now.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2077

CC: peter.maydell@linaro.org
CC: crosa@redhat.com
CC: philmd@linaro.org
CC: bleal@redhat.com
CC: mst@redhat.com
CC: wainersm@redhat.com
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Message-id: 20240108103643.4434-3-anisinha@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>