gh-32 rebase on the main branch of upstream cpython#36

RMPR wants to merge 3077 commits into

Rust-for-CPython:3.15-rust-in-cpythonRust-for-CPython/cpython:3.15-rust-in-cpythonfrom

RMPR:3.16-rust-in-cpythonRMPR/cpython:3.16-rust-in-cpythonCopy head branch name to clipboard