test: fix test-readline-interface

Previous unit test delay is too short for parallel test on raspberry pi,
it will fail sometimes.  This PR use common.platformTimeout and widen
the time gap.

PR-URL: #14677
Ref: #14674
Reviewed-By: Refael Ackermann <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Rich Trott <[email protected]>

Author: Azard

test/parallel/test-readline-interface.js

@@ -262,8 +262,8 @@ function isWarned(emitter) {
   // over the default crlfDelay but within the setting value
   {
     const fi = new FakeInput();
-    const delay = 200;
-    const crlfDelay = 500;
+    const delay = 125;
+    const crlfDelay = common.platformTimeout(1000);
     const rli = new readline.Interface({
       input: fi,
       output: fi,