Ci py3.10
_The documentation is not available anymore as the PR was closed or merged._ Does it sound good to you @albertvillanova ?
Added a CI job for python 3.10

Some dependencies don't work on 3.10 like apache beam, so I remove them from the extras in this case.
I also removed some s3 fixtures that we don't use anymore (and that don't work on 3.10 anyway)