PB-341: Save content as template

- Fix integration test failure

Author: davemacaulay

dev/tests/integration/testsuite/Magento/PageBuilder/_files/ignore_whitelisting/pagebuilder.json

@@ -0,0 +1,10 @@
+{
+  "pagebuilder_template": {
+    "constraint": [
+      "PRIMARY"
+    ],
+    "index": [
+      "PAGEBUILDER_TEMPLATE_NAME"
+    ]
+  }
+}