ENGCOM-1848: [Backport] Prevent multiple add-to-cart initializations in case of ajax loaded product listing #15801

 - Merge Pull Request #15801 from viral-wagento/magento2:feature-fix-multiple-add-to-cart-requests
 - Merged commits:
   1. 1206e78

Author: magento-engcom-team

app/code/Magento/Catalog/view/frontend/web/js/catalog-add-to-cart.js

@@ -33,6 +33,10 @@ define([
 
         _bindSubmit: function() {
             var self = this;
+            if (this.element.data('catalog-addtocart-initialized')) {
+                return;
+            }
+            this.element.data('catalog-addtocart-initialized', 1);
             this.element.on('submit', function(e) {
                 e.preventDefault();
                 self.submitForm($(this));