Can't run Python function app using Azure IoT SDK on Apple M1

[jimbobbennett]

When running an Azure function app on an Apple M1 that uses the Azure Python IoT SDK, you get errors:

[2021-01-22T00:04:13.014Z] Result: Failure
[2021-01-22T00:04:13.014Z] Exception: ImportError: dlopen(/Users/jimbennett/GitHub/iot-func-error/.venv/lib/python3.8/site-packages/uamqp/c_uamqp.cpython-38-darwin.so, 2): Symbol not found: _SASToken_CreateString
[2021-01-22T00:04:13.014Z]   Referenced from: /Users/jimbennett/GitHub/iot-func-error/.venv/lib/python3.8/site-packages/uamqp/c_uamqp.cpython-38-darwin.so
[2021-01-22T00:04:13.014Z]   Expected in: flat namespace
[2021-01-22T00:04:13.014Z]  in /Users/jimbennett/GitHub/iot-func-error/.venv/lib/python3.8/site-packages/uamqp/c_uamqp.cpython-38-darwin.so. Troubleshooting Guide: https://aka.ms/functions-modulenotfound

See this repo for reproduction steps and code to show the issue:

https://github.com/jimbobbennett/iot-func-error

[ejizba]

Consolidating M1 issues. Will use Azure/azure-functions-python-worker#915 for Python work and #2834 for core tools