test: use mustCall() in test-readline-interface

Use `common.mustCall()` to make sure noop function is called as
expected.

PR-URL: #13259
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Trott

test/parallel/test-readline-interface.js

@@ -541,7 +541,7 @@ function isWarned(emitter) {
     });
 
     const rl = readline.createInterface({
-      input: new Readable({ read: () => {} }),
+      input: new Readable({ read: common.mustCall() }),
       output: output,
       prompt: '$ ',
       terminal: terminal