Add python 3.10 to build workflow and fix upload jobs

[wbarnha]

I've had success using this library in Python 3.10, so it'd be appropriate to update it here.

[wbarnha]

I have a fully operational pipeline in https://github.com/faust-streaming/python-rocksdb, in case further reference is sought. I haven't included all the changes since our repo is structured differently.

[wbarnha]

Something worth noting is that the wheels we uploaded onto PyPi are comically large (66 MB), other forks such as https://pypi.org/project/lbry-rocksdb/#files have managed to create smaller wheels. It'd be nice to understand why these wheels are so large. My initial thought was that something could've been included with librocksdb, but python-rocksdb will not work without librocksdb installed onto a machine.

Edit: I just realized this bundles librocksdb lol

[NightTsarina]

Hey, I am sorry I missed this completely! I even had some draft review of the PR but I never clicked send :(

[wbarnha]

No sweat, it happens! I'll reopen it for you.