Change `wasm32-wasip2` to use the stable path to `fd`

[tgross35]

Attempting to build without the nightly feature hits an error here:

tempfile/src/file/mod.rs

Lines 10 to 11 in b0e6309

	#[cfg(target_os = "wasi")]
	use std::os::wasi::io::{AsFd, AsRawFd, BorrowedFd, RawFd};

This can be sidestepped by importing the types via std::os::fd::*;, which is a stable path https://rust.godbolt.org/z/rKrG6fvc5. The above cfg(unix) import can use the same path.

The way os::wasi works seems unusual so I asked about it here #general > std::os::wasi unstable on wasip2.

[tgross35]

Thanks for the quick fix!

[Stebalien]

Thanks for the report! Tempfile 3.23 is now out with the fix.

[Stebalien]

It looks like wasip2 is still going to fail on stable due to #382 (comment) bytecodealliance/rustix#1301

[tgross35]

Argh sorry about that, I should have shaken down to the next tree. I'm hoping that the Zulip topic will help figure out what can be stabilized anyway.

[Stebalien]

Eh, I should have fixed CI before declaring it "done".