feat: drop symbolic links requirement

feat: add last_rc testing

feat: add py2.py3 Python tag

feat: updates for Bazel v9

fix: don't force Python minor version restriction on abi3 and none tags

Disable Rust toolchain by default

fix: merge PYTHON_PATH defines

chore: bump versions and cut 0.6.1

chore: prepare for v0.6.0 release

feat: use module internal repositories for wheels and sdists