Add missing rules_proto calls for deps, etc.

[restingbull]

Changes

• Download rules_proto dependencies
• Fix shas in rules_proto dependencies as the new version is broken
• Update rules_python for the new rules_pkg
• Some steps to simplify version management.

Notes

• We can probably remove the python dependency entirely -- it appears to do some small archive manipulation. that toolchain needs some love.
• Hey, ho, rules_proto has got to go! We should move to json for the worker chatter and away from the using it as a compilation model.

[Bencodes]

Hey, ho, rules_proto has got to go! We should move to json for the worker chatter and away from the using it as a compilation model.

I can probably take a look at this. It's not super hard to migrate over. We'll just need to have people flip the flag on Bazel 4 (unless we drop it).