Grpc channel created in different event loop

[JonatanMartens]

Describe the bug
When running a ZeebeWorker using asyncio.run a RuntimeError will be raised with the message attached to a different event loop.

This happens in version 3.0.0rc3 after we removed the channel creation from the worker.

To Reproduce

1. Install pyzeebe version 3.0.0rc3 (pip install -U pyzeebe=3.0.0rc3)
2. Run the following code:

   import asyncio
   
   from pyzeebe import ZeebeWorker, create_insecure_channel
   
   
   channel = create_insecure_channel()
   worker = ZeebeWorker(channel)
   
   
   @worker.task("test")
   def test():
       return {}
   
   
    asyncio.run(worker.work())

Workarounds

Create the channel and worker in an async function:

async def main():
    channel = create_insecure_channel()
    worker = ZeebeWorker(channel)

asyncio.run(main())

Or use a loop:

loop = asyncio.get_running_loop()  # or get_event_loop(). This will get the loop in which the grpc.aio.Channel object was created
loop.run_until_complete(worker.work())

[JonatanMartens]

Fixed in docs