Azure: Add fuse device for test.py tests

The EFI secure boot and capsule test setups need to prepare disk images
for their tests using virt-make-fs, which requires access to the host
fuse device. This is not exposed to the docker container by default and
has to be added explicitly. Add it.

Signed-off-by: Alper Nebi Yasak <alpernebiyasak@gmail.com>