Switch to boto3

[yarikoptic]

It is to happen for datalad core in coming minor release

• RF: Drop boto for boto3 datalad#7575
  which would break compatibility with datalad-crawler by removing get_key_url which operates on boto's construct AFAIK:

/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/site-packages/datalad_crawler/nodes/s3.py:21: in <module>
53
    from datalad.support.s3 import get_key_url
54
E   ImportError: cannot import name 'get_key_url' from 'datalad.support.s3' (/home/runner/work/datalad/datalad/datalad/support/s3.py)

and also there is some direct use of boto here:

datalad_crawler/nodes/s3.py:from boto.s3.key import Key
datalad_crawler/nodes/s3.py:from boto.s3.prefix import Prefix
datalad_crawler/nodes/s3.py:from boto.s3.deletemarker import DeleteMarker
setup.py:        'boto',  # used directly by datalad_crawler/nodes/s3.py

so meanwhile we would need to restrict for crawler to have datalad < 1.1.0

[effigies]

The ImportError is fixed here: #143

That doesn't mean that use of the S3Downloader is working correctly. It isn't.