Upgrade Python bindings to latest PyO3 major version. #1777

Job	Run time
Check fuzz targets	42s
Check lint and rustfmt	1m 56s
Check rustdoc WASM target	36s
Run JS linters	59s
Run tests	3m 6s
pre-publish checks	1s
Python tests and maturin build	1s
WASM tests	1s
All CI stages	1s
pre-publish checks	1s
publish trustfall_filetests_macros	1s
publish trustfall_core	1s
publish python trustfall	1s
publish trustfall_derive	1s
publish trustfall	1s
publish trustfall_stubgen	1s
	7m 30s

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