ENGCOM-2584: [Backport 2.1] Fix 'pattern' UI Component validation #17213

 - Merge Pull Request #17213 from mageprince/magento2:mageprince-2.1-patch-pull-11565
 - Merged commits:
   1. 64bad6b
   2. 50f4051

Author: magento-engcom-team

app/code/Magento/Ui/view/base/web/js/lib/validation/rules.js

@@ -316,7 +316,7 @@ define([
         ],
         "pattern": [
             function(value, param) {
-                return param.test(value);
+                return new RegExp(param).test(value);
             },
             $.mage.__('Invalid format.')
         ],