While fixing some errors with Bazel 9 in rules_python, I came across an error in stardoc:

ERROR: /<snip>/external/stardoc+/stardoc/proto/BUILD:21:1: name 'proto_library' is not defined

I'm guessing that this is related to the removal of native rules from Bazel.

This is probably going to show up elsewhere in bazel downstream builds, so cc @sgowroji