acpi/tests/avocado/bits: enable console logging from bits VM

Console logs from the VM can be useful for debugging when things go wrong.
Other avocado tests enables them. This change enables console logging with the
following changes:
 - point to the newer bios bits image that actually enabled VM console.
 - change the bits test to drain the console logs from the VM and write the
   logs.
 - wait for SHUTDOWN event from QEMU so that console logs can be drained out
   of the socket before it is closed as a part of vm.wait().

Additionally, following two cosmetic changes have been made:
 - Removed VM QEMU command line logging as avocado framework already logs it.
   This is a minor cleanup along the way.
 - Update my email to my work email in the avocado acpi bios bits test.

CC: jsnow@redhat.com
Signed-off-by: Ani Sinha <anisinha@redhat.com>
Message-Id: <20231027032120.6012-3-anisinha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>