Rollup merge of #138949 - madsmtm:rename-to-darwin, r=WaffleLapkin

Rename `is_like_osx` to `is_like_darwin`

Replace `is_like_osx` with `is_like_darwin`, which more closely describes reality (OS X is the pre-2016 name for macOS, and is by now quite outdated; Darwin is the overall name for the OS underlying Apple's macOS, iOS, etc.).

``@rustbot`` label O-apple
r? compiler

compiler/rustc_driver_impl/src/lib.rs

@@ -807,7 +807,7 @@ fn print_crate_info(
                 }
             }
             DeploymentTarget => {
-                if sess.target.is_like_osx {
+                if sess.target.is_like_darwin {
                     println_info!(
                         "{}={}",
                         apple::deployment_target_env_var(&sess.target.os),