#23766 - fix pattern validation on form submit

Author: vahir2016

lib/web/mage/validation.js

@@ -559,7 +559,7 @@
         /* eslint-enable max-len */
         'pattern': [
             function (value, element, param) {
-                return this.optional(element) || param.test(value);
+                return this.optional(element) || new RegExp(param).test(value);
             },
             $.mage.__('Invalid format.')
         ],