Install infinite loop with aws "extra"

[1sttec]

python -m pip install prefect[all_extras]

or any combination of extras that includes 'aws' hangs on infinite loop with repeating msg:

"WARNING: dask-cloudprovider X.X.X does not provide the extra 'aws'"

• Windows Server 2012 R2
• Python 3.7.1
• Pip 21.2.4

Please advise.

[zanieb]

Please do not double open issues. I will respond in #4906