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.

crates/runtime/Cargo.toml

@@ -30,7 +30,7 @@ anyhow = "1.0.38"
 mach = "0.3.2"
 
 [target.'cfg(unix)'.dependencies]
-rustix = "0.31.0"
+rustix = "0.33.0"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 winapi = { version = "0.3.7", features = ["winbase", "memoryapi", "errhandlingapi", "handleapi"] }