Use is-terminal instead of atty.

Following up on #3696, use the new is-terminal crate to test for a tty
rather than having platform-specific logic in Wasmtime. The is-terminal
crate has a platform-independent API which takes a handle.

This also updates the tree to cap-std 0.24 etc., to avoid depending on
multiple versions of io-lifetimes at once, as enforced by the cargo deny
check.

Cargo.toml

@@ -41,7 +41,7 @@ wasmparser = "0.81.0"
 lazy_static = "1.4.0"
 
 [target.'cfg(unix)'.dependencies]
-rustix = "0.31.0"
+rustix = "0.33.0"
 
 [dev-dependencies]
 # depend again on wasmtime to activate its default features for tests