test: see value of "hadError" in tls test

The existing implementation created a state that if the assert failed
we got an error message without the values of hadError.
Removed the default error message and added a comment explaining the
assert.

PR-URL: nodejs#22069
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Jon Moss <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>

test/parallel/test-tls-hello-parser-failure.js

@@ -60,6 +60,7 @@ const server = tls.createServer(options, function(c) {
   }));
 
   client.on('close', common.mustCall(function(hadError) {
-    assert.strictEqual(hadError, true, 'Client never errored');
+    // Confirm that client errored
+    assert.strictEqual(hadError, true);
   }));
 }));