Introduce new style for python extensions #3414

Job	Run time
Checks / Test Python Docs	32s
Checks / Check Rust web build (wasm32 + wasm-bindgen)	2m 51s
Checks / Python lints (black, mypy, flake8)	1m 37s
Checks / Rust lints (fmt, check, cranky, tests, doc)	11m 32s
Checks / Lint TOML files	20s
Checks / Rerun lints	26s
Checks / Spell Check	8s
Checks / Cargo Deny	1m 17s
Checks / C++ formatting check	1m 50s
Checks / C++ tests	10m 41s
Minimum Wheel / Set Config (linux)	2s
Build & Upload rerun_c (Linux x64) / Set Config (linux)	3s
Update PR Body / Update PR body	44s
Build Web / Build Web (wasm32 + wasm-bindgen)	4m 19s
Minimum Wheel / Build Wheels (ubuntu-latest-16-cores)	9m 37s
Build & Upload rerun_c (Linux x64) / Build rerun_c (ubuntu-latest-16-cores)	1m 48s
Run Notebook / Run notebook	1m 39s
Build Web Demo / Build Web Demo	4m 51s
Upload Web / Upload web build to google cloud (wasm32 + wasm-bindgen)	16s
Save PR Summary / Create HTML summary for PR	47s
Track Sizes / Track Sizes	43s
Upload Web Demo / Upload Web Demo to Google Cloud	1m 0s
	57m 3s

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