feature #59114 [ErrorHandler] support non-empty-string/non-empty-list when patching return types (xabbuh)

This PR was merged into the 7.3 branch.

Discussion
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[ErrorHandler] support non-empty-string/non-empty-list when patching return types

| Q             | A
| ------------- | ---
| Branch?       | 7.3
| Bug fix?      | no
| New feature?  | yes
| Deprecations? | no
| Issues        |
| License       | MIT

see the failures in #59075

Commits
-------

01c78b3b30 support non-empty-string/non-empty-list when patching return types

Author: derrabus

DebugClassLoader.php

@@ -68,12 +68,14 @@ class DebugClassLoader
         'iterable' => 'iterable',
         'object' => 'object',
         'string' => 'string',
+        'non-empty-string' => 'string',
         'self' => 'self',
         'parent' => 'parent',
         'mixed' => 'mixed',
         'static' => 'static',
         '$this' => 'static',
         'list' => 'array',
+        'non-empty-list' => 'array',
         'class-string' => 'string',
         'never' => 'never',
     ];