Move off nightly for WASIp2

[crepererum]

What

Use the stable Rust compiler to build our WASIp2 payloads.

Why

• Not having to worry about a 2nd compiler version is nice.
• No more custom forks for dependencies.

How

We probably need to wait for rust-lang/rust#130323 .

Then drop the nightly requirement and remove our dependency forks:

datafusion-udf-wasm/Cargo.toml

Lines 28 to 32 in 38ed608

	# patches to get wasi p2 to run without extra feature flags
	# See <https://github.com/rust-lang/rust/issues/130323>.
	[patch.crates-io]
	pyo3 = { git = "https://github.com/crepererum/pyo3.git", rev = "92f97bdb0291852e2e0fc59312b69e9f73e47f16" }
	tempfile = { git = "https://github.com/crepererum/tempfile.git", rev = "bdfa162a052d5239c4d42e6b706f9d2e9e040f02" }

[crepererum]

tempfile is no longer used by the WASI payload. For pyo3 it seems that we might be able to get away without the nightly feature flag, see PyO3/pyo3#5368 (comment)