Fix rustfst-python build in various ways to support Python 3.12 among other things #1297

Job	Run time
Check rust formatting	18s
Check python formatting	4s
Fetch or Build OpenFST (ubuntu-latest)	17s
Fetch or Build OpenFST (macos-13)	14s
python-doc	40s
rust-doc	16s
rust-clippy	19s
rustfst-python (ubuntu-latest)	26s
rustfst-python-bench	2m 32s
rustfst-python (macos-13)	1m 10s
rust-tests (1.74.0, ubuntu-latest, --all --benches --examples --bins --tests)	2m 9s
rust-tests (1.74.0, ubuntu-latest, --manifest-path rustfst/Cargo.toml --features "state-label-u32")	2m 7s
rust-tests (1.74.0, macos-13, --all --benches --examples --bins --tests)	3m 46s
rust-tests (1.74.0, macos-13, --manifest-path rustfst/Cargo.toml --features "state-label-u32")	4m 45s
rust-tests (stable, ubuntu-latest, --all --benches --examples --bins --tests)	2m 3s
rust-tests (stable, ubuntu-latest, --manifest-path rustfst/Cargo.toml --features "state-label-u32")	2m 1s
rust-tests (stable, macos-13, --all --benches --examples --bins --tests)	1m 54s
rust-tests (stable, macos-13, --manifest-path rustfst/Cargo.toml --features "state-label-u32")	2m 5s
Build source distribution	0s
Publish Rust Crate to Crates.io	0s
Publish rustfst-python's doc	0s
Publish Python Wheels to PyPI	0s
	27m 6s

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