iotests.py: add filter_qemu()

Add a filter_qemu() helper function for replacing the QEMU program
name with 'QEMU_PROG' in test's log messages.

Signed-off-by: Fiona Ebner <f.ebner@proxmox.com>
Message-ID: <20260930132140.2342574-3-f.ebner@proxmox.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
1 file changed