PB-41: Multiple AJAX requests while searching in ui-select in PageBuilder

- Debounce requests using Knockout's notifyWhenChangesStop for Product
- Product is the only UrlInput type with searchUrl

Author: danmooney2

app/code/Magento/Catalog/Ui/Component/UrlInput/Product.php

@@ -46,6 +46,7 @@ public function getConfig(): array
             'template' => 'ui/grid/filters/elements/ui-select',
             'searchUrl' => $this->urlBuilder->getUrl('catalog/product/search'),
             'filterPlaceholder' => __('Product Name or SKU'),
+            'filterRateLimitMethod' => 'notifyWhenChangesStop',
             'isDisplayEmptyPlaceholder' => true,
             'emptyOptionsHtml' => __('Start typing to find products'),
             'missingValuePlaceholder' => __('Product with ID: %s doesn\'t exist'),