lots of gRPC error output in diag logs about hm-diag

[shawaj]

also seen this one:

2023-04-14 03:48:02,468 - [INFO] - hw_diag.utilities.hardware - (hardware.py).get_ble_devices -- /opt/python-dependencies/hw_diag/utilities/hardware.py:(103) - Found the following BLE Devices: [{'Address': 'DC:A6:32:6A:36:C0', 'Name': 'nebra-6A36BE.local', 'Powered': '1', 'Discoverable': '0', 'Pairable': '0', 'Discovering': '0'}]
INFO:hw_diag.utilities.hardware:Found the following BLE Devices: [{'Address': 'DC:A6:32:6A:36:C0', 'Name': 'nebra-6A36BE.local', 'Powered': '1', 'Discoverable': '0', 'Pairable': '0', 'Discovering': '0'}]
2023-04-14 03:48:02,469 - [INFO] - hw_diag.utilities.hardware - (hardware.py).get_lte_devices -- /opt/python-dependencies/hw_diag/utilities/hardware.py:(149) - Retrieving list of LTE device(s)
INFO:hw_diag.utilities.hardware:Retrieving list of LTE device(s)
2023-04-14 03:48:02,475 - [INFO] - hw_diag.utilities.hardware - (hardware.py).get_lte_devices -- /opt/python-dependencies/hw_diag/utilities/hardware.py:(176) - Found the following LTE Devices: []
INFO:hw_diag.utilities.hardware:Found the following LTE Devices: []
INFO:root:Diagnostics shipping not requested, skipping.
INFO:root:Diagnostics complete
INFO:root:Running periodic hardware diagnostics
Exception in thread Thread-164 (_run):
Traceback (most recent call last):
  File "/usr/local/lib/python3.11/threading.py", line 1038, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.11/threading.py", line 975, in run
    self._target(*self._args, **self._kwargs)
  File "src/python/grpcio/grpc/_cython/_cygrpc/thread.pyx.pxi", line 53, in grpc._cython.cygrpc._run_with_context._run
  File "/opt/python-dependencies/grpc/_channel.py", line 1547, in _poll_connectivity
    event = channel.watch_connectivity_state(connectivity,
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 510, in grpc._cython.cygrpc.Channel.watch_connectivity_state
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 377, in grpc._cython.cygrpc._watch_connectivity_state
  File "src/python/grpcio/grpc/_cython/_cygrpc/channel.pyx.pxi", line 385, in grpc._cython.cygrpc._watch_connectivity_state
ValueError: Cannot monitor channel state: Channel closed!
2023-04-14 03:49:02,881 - [INFO] - hm_pyhelper.miner_param 

[shawaj]

https://nebraltd.atlassian.net/browse/NEBD-110