Add support for s3.addressing_style virtual

[lijok]

Maybe I missed this in the docs but couldn't find a way to tell the s3 client to use virtual addressing style

[pjbull]

Thanks for the report. It looks like we don't currently support the client config where that gets configured.

• We should support initializing S3Client with a botocore.client.Config so that all the options there are available.

• We should use .merge on the config in the places where we currently explicitly construct a Config

• We should update documentation

Happy to take a PR that enables this