[FIX] website, website_sale: fix race condition on dynamic snippet

Prior to this commit:

    A race condition could occur when dropping the dynamic product snippet
    creating a traceback "Cannot read property 'limit' of undefined".

After this commit:

    Potential race condition has been removed from the code.

closes odoo/odoo#61890

X-original-commit: de14be4986ef4a293b99523b7dc110be3b16b8ea
Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>

addons/website/static/src/snippets/s_dynamic_snippet/options.js

@@ -62,8 +62,9 @@ const dynamicSnippetOptions = snippetOptions.SnippetOptionWidget.extend({
      * @override
      * @private
      */
-    _renderCustomXML: function (uiFragment) {
-        return Promise.all([this._renderDynamicFiltersSelector(uiFragment), this._renderDynamicFilterTemplatesSelector(uiFragment)]);
+    _renderCustomXML: async function (uiFragment) {
+        await this._renderDynamicFiltersSelector(uiFragment);
+        await this._renderDynamicFilterTemplatesSelector(uiFragment);
     },
     /**
      * Renders the dynamic filter option selector content into the provided uiFragment.

addons/website_sale/static/src/snippets/s_dynamic_snippet_products/options.js

@@ -68,8 +68,9 @@ const dynamicSnippetProductsOptions = s_dynamic_snippet_carousel_options.extend(
      * @override
      * @private
      */
-    _renderCustomXML: function (uiFragment) {
-        return Promise.all([this._super.apply(this, arguments), this._renderProductCategorySelector(uiFragment)]);
+    _renderCustomXML: async function (uiFragment) {
+        await this._super.apply(this, arguments);
+        await this._renderProductCategorySelector(uiFragment);
     },
     /**
      * Renders the product categories option selector content into the provided uiFragment.