tests: smbios: make it possible to write SMBIOS only test

tests: smbios: make it possible to write SMBIOS only test

Cureently it not possible to run SMBIOS test without ACPI one,
which gets into the way when testing ACPI-less configs.

Extract SMBIOS testing into separate routines that could also
be run without ACPI dependency and use that for testing SMBIOS.

As the 1st user add "acpi/piix4/smbios-options" test case.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Ani Sinha <anisinha@redhat.com>
Tested-by: Fiona Ebner <f.ebner@proxmox.com>
Message-Id: <20240314152302.2324164-2-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>