Fix PHP 8.1 "strlen(null)" exception which blocks rendering a project's page when Reports prototype enabled

Summary:
`strlen()` was used in Phabricator to check if a generic value is a non-empty string.
This behavior is deprecated since PHP 8.1. Phorge adopts `phutil_nonempty_string()` as a replacement.

Note: this may highlight other absurd input values that might be worth correcting
instead of just ignoring. If phutil_nonempty_string() throws an exception in your
instance, report it to Phorge to evaluate and fix that specific corner case.

This is exactly the same case as D25140.

Closes T15360

Test Plan: Applied this change and `/project/view/1/` rendered the workboard in the web browser as expected.

Reviewers: O1 Blessed Committers, valerio.bozzolan

Reviewed By: O1 Blessed Committers, valerio.bozzolan

Subscribers: speck, tobiaswiese, valerio.bozzolan, Matthew, Cigaryno

Maniphest Tasks: T15360

Differential Revision: https://we.phorge.it/D25199

src/applications/project/menuitem/PhabricatorProjectReportsProfileMenuItem.php

@@ -46,7 +46,7 @@ final class PhabricatorProjectReportsProfileMenuItem
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (phutil_nonempty_string($name)) {
       return $name;
     }