Replace atty::is(Stderr) with stdlib

Summary:
`std::io::IsTerminal` was stabilized in 1.70. It is intended to be a drop in replacement for `atty::is(Stderr)`.

This codemod replaces all usages of `atty::is(Stderr)` with `stderr().is_terminal()`, importing the necessary paths.

It used this script (generated with assistance from Metamate):
```
#!/bin/bash

files=$(fbgs -sl "atty::is(atty::Stream::Stderr)" | arc linttool debugfilterpaths --take RUSTFMT)

for file in $files; do
  sed -i 's/atty::is(atty::Stream::Stderr)/stderr().is_terminal()/g' $file
done

for file in $files; do
  sed -i '1i use std::io::{stderr, IsTerminal};' $file
done
```

`arc f` was ran twice, followed by two invocations of `arc lint -e extra --take RUSTFIXDEPS`.

This script was a little naive though, and as a result, I had to manually move the newly added imports to the correct line. I ran lints again afterwards.

Reviewed By: Imxset21

Differential Revision: D46601192

fbshipit-source-id: 18ef53a9fa25cbd733ca81f16b2c13ce8c5ddb98

hermit-cli/Cargo.toml

@@ -7,7 +7,6 @@ edition = "2021"
 
 [dependencies]
 anyhow = "1.0.65"
-atty = "0.2"
 bincode = "1.3.3"
 clap = { version = "3.2.25", features = ["derive", "env", "regex", "unicode", "wrap_help"] }
 colored = "1.9"

hermit-cli/src/bin/hermit/tracing.rs

@@ -8,6 +8,8 @@
 
 use std::fs::File;
 use std::io;
+use std::io::stderr;
+use std::io::IsTerminal;
 
 use tracing::metadata::LevelFilter;
 use tracing::Subscriber;
@@ -63,7 +65,7 @@ pub fn stderr_subscriber(level: Option<LevelFilter>) -> impl Subscriber {
     tracing_subscriber::fmt()
         .with_env_filter(filter)
         .with_writer(io::stderr)
-        .with_ansi(atty::is(atty::Stream::Stderr))
+        .with_ansi(stderr().is_terminal())
         .finish()
 }