text: Title: [Fleet] Remove timestamp from component template
  Body: ES fixed a bug here: https://github.com/elastic/elasticsearch/issues/58956 that required us to include the timestamp field in component templates that defined a mapping section here: https://github.com/elastic/kibana/blob/0b16688a241d3c868ba54b404861f9b71adfe792/x-pack/plugins/fleet/server/services/epm/elasticsearch/template/install.ts#L197
  
  https://github.com/elastic/kibana/blob/0b16688a241d3c868ba54b404861f9b71adfe792/x-pack/test/fleet_api_integration/apis/epm/install_overrides.ts#L67
  
  This can now be removed as the bug is fixed.