93c507cc8f
Alerting docs: update `Configure alert rules` (#97430)
* Simplify a bit more Intro to Alert rules
* Update `Configure alert rules` docs
* Configure Grafana-managed alert rules
* Update `Configure data source-managed alert rules`
* fix mispelled word
* fix grammar error
* remove unnecessary space
* remove whitespace
* address brand name convention
(cherry picked from commit 7f99388576)