"full" implementation of new `Py2` API #8083

Job	Run time
emscripten	0s
fmt	16s
check-msrv	8m 18s
python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }} rust-${{ matrix.rust }}	0s
careful	0s
coverage-windows	4s
docsrs	0s
coverage-macos	8s
semver-checks	23s
coverage-ubuntu	6m 58s
test-debug	8m 17s
valgrind	0s
clippy/x86_64-apple-darwin/stable	8m 19s
clippy/x86_64-unknown-linux-gnu/stable	6m 57s
clippy/powerpc64le-unknown-linux-gnu/stable	6m 9s
clippy/s390x-unknown-linux-gnu/stable	6m 16s
clippy/wasm32-wasi/stable	6m 4s
clippy/x86_64-pc-windows-msvc/stable	8m 6s
clippy/i686-pc-windows-msvc/stable	8m 10s
clippy/x86_64-unknown-linux-gnu/beta	6m 56s
python3.12-x64 ubuntu-latest rust-stable / build	37s
python3.12-x64 windows-latest rust-stable / build	31s
python3.12-x86 windows-latest rust-stable / build	40s
python3.12-x64 macos-latest rust-stable / build	54s
python3.12-x64 ubuntu-latest rust-nightly / build	34s
conclusion	1s
	1h 24m 38s

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