Move setup_callbacks call to create_compiler_and_run

This ensures that it is called even when run_in_thread_pool_with_globals
is avoided and reduces code duplication between the parallel and
non-parallel version of run_in_thread_pool_with_globals

src/librustdoc/lib.rs

@@ -688,7 +688,7 @@ fn main_args(at_args: &[String]) -> MainResult {
         Ok(opts) => opts,
         Err(code) => return if code == 0 { Ok(()) } else { Err(ErrorReported) },
     };
-    rustc_interface::util::setup_callbacks_and_run_in_thread_pool_with_globals(
+    rustc_interface::util::run_in_thread_pool_with_globals(
         options.edition,
         1, // this runs single-threaded, even in a parallel compiler
         &None,