ACP2E-2511: [Cloud] Special characters cannot be used in name fields

Author: Sarmistha

app/code/Magento/Customer/Model/Validator/Name.php

@@ -15,7 +15,7 @@
  */
 class Name extends AbstractValidator
 {
-    private const PATTERN_NAME = '/(?:[\p{L}\p{M}\,\-\_\.\'’`\s\d]){1,255}+/u';
+    private const PATTERN_NAME = '/(?:[\p{L}\p{M}\,\-\_\.\'’`&\s\d]){1,255}+/u';
 
     /**
      * Validate name fields.

app/code/Magento/Customer/Test/Unit/Model/Validator/NameTest.php

@@ -87,6 +87,12 @@ public function expectedPunctuationInNamesDataProvider(): array
                 'middleName' => '',
                 'lastNameName' => 'O`Doe',
                 'message' => 'Grave accent back quote character must be allowed in names'
+            ],
+            [
+                'firstName' => 'John & Smith',
+                'middleName' => '',
+                'lastNameName' => 'O`Doe',
+                'message' => 'Special character ampersand(&) must be allowed in names'
             ]
         ];
     }