Adding support for multicast stream data

[ryan-summers]

This PR fixes #786 by updating the python tools to direct Stabilizer to stream to multicast UDP addresses. Note that there is no firmware change required for this.

Local run of the streaming HITL:

$ python311 hitl/streaming.py --broker 10.35.20.1 dt/sinara/dual-iir/04-91-62-d2-a8-6f
INFO:gmqtt.mqtt.protocol:[CONNECTION MADE]
INFO:gmqtt.mqtt.package:[SEND SUB] 1 [b'dt/sinara/dual-iir/04-91-62-d2-a8-6f/response']
INFO:gmqtt.mqtt.package:[SEND SUB] 2 [b'dt/sinara/dual-iir/04-91-62-d2-a8-6f/settings/#']
INFO:gmqtt.mqtt.handler:[SUBACK] 1 (0,)
INFO:miniconf.miniconf:Handling subscription for 1
INFO:gmqtt.mqtt.handler:[SUBACK] 2 (0,)
INFO:miniconf.miniconf:Handling subscription for 2
INFO:__main__:Starting stream
INFO:miniconf.miniconf:Sending "{'ip': [239, 192, 1, 100], 'port': 9293}" to "dt/sinara/dual-iir/04-91-62-d2-a8-6f/settings/stream_target" with CD: b'9ea73129681e11ee979b60f262b6eb3e'
INFO:__main__:Testing stream reception
INFO:stabilizer.stream:Connection made (listening)
INFO:stabilizer.stream:Received 59.9231 MB, 5.99231 MB/s
INFO:stabilizer.stream:Loss: 38918/975216 batches (3.99071 %)
INFO:__main__:Stopping stream
INFO:miniconf.miniconf:Sending "{'ip': [0, 0, 0, 0], 'port': 0}" to "dt/sinara/dual-iir/04-91-62-d2-a8-6f/settings/stream_target" with CD: b'a49b9329681e11ee92d760f262b6eb3e'
INFO:__main__:Draining queue
INFO:__main__:Verifying no further frames are received
PASS

[jordens]

Good!