* Recommend Metricbeat for 7.x
* Fix typo in link to configuring-metricbeat
* [DOCS] Fixes build error and some terminology
* Add to local exporter page per review feedback
`+` for index name inclusions is no longer supported for 6.x+. This
commit removes references of the `+` from the documenation. System
indices additional example is also included.
fixes#37237