[Security Solution] Filterlist Update for Endpoint Events (#187053)

## Summary
Updates endpoint alerts telemetry filter list to add the following new
fields for the events.

* origin_referrer_url
* origin_url

### For maintainers

- [ ] This was checked for breaking API changes and was [labeled
appropriately](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process)

x-pack/plugins/security_solution/server/lib/telemetry/filterlists/endpoint_alerts.ts

@@ -80,6 +80,8 @@ const allowlistBaseEventFields: AllowlistFields = {
     mtime: true,
     directory: true,
     hash: true,
+    origin_referrer_url: true,
+    origin_url: true,
     pe: true,
     Ext: {
       bytes_compressed: true,