Update and pin dev-deps on aiobotocore 2.1.0

[dazza-codes]

Could be issues with s3fs for updating to aiobotocore 2.1.0, see

• Tracking aiobotocore fsspec/s3fs#528
• bump aiobotocore to 2.1.0 fsspec/s3fs#564

There are failures in pandas and zarr:

FAILED tests/test_aio_s3fs.py::test_pandas_s3_io - AttributeError: module 'aiobotocore' has no attribute 'AioSession'
FAILED tests/test_aio_s3fs.py::test_zarr_s3_io - AttributeError: module 'aiobotocore' has no attribute 'AioSession'
ERROR tests/test_aio_s3fs.py::test_pandas_s3_io - AssertionError: assert 0 > 0
ERROR tests/test_aio_s3fs.py::test_zarr_s3_io - AssertionError: assert 0 > 0

There might be no point in further work on this until s3fs/pandas/zarr resolve things. I'm not sure what's going on with aiobotocore sem-ver releases, because an upgrade from 2.0.1 to 2.1.0 should not break an import like this. The change might require all consuming libs to use more explicit import paths like aiobotocore.session.AioSession (?).

[dazza-codes]

Abandoning this PR, because aiobotocore 2.1.2 is working OK.