At some point something changed in upstream config or in celery and now
a black transport is no longer valid. You have to supply some transport
even if you are running in always eager mode. Add enough config so that
celery tasks will execute without issues when running `runserver` on
baremetal.
Fixes the "No such transport" error:
```
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/task.py", line 575, in apply_async
with app.producer_or_acquire(producer) as eager_producer: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/base.py", line 932, in producer_or_acquire producer, self.producer_pool.acquire, block=True,
^^^^^^^^^^^^^^^^^^
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/base.py", line 1354, in producer_pool
return self.amqp.producer_pool ^^^^^^^^^^^^^^^^^^^^^^^
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/amqp.py", line 591, in producer_pool
self.app.connection_for_write()]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/base.py", line 829, in connection_for_write
return self._connection(url or self.conf.broker_write_url, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/celery/app/base.py", line 880, in _connection
return self.amqp.Connection(
^^^^^^^^^^^^^^^^^^^^^ File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/kombu/connection.py", line 201, in __init__
if not get_transport_cls(transport).can_parse_url: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/kombu/transport/__init__.py", line 91, in get_transport_cls _transport_cache[transport] = resolve_transport(transport)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/feanil/.virtualenvs/edx-platform/lib/python3.11/site-packages/kombu/transport/__init__.py", line 72, in resolve_transport
raise KeyError(f'No such transport: {transport}') KeyError: 'No such transport: '
```
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