Added new Prometheus Rule Groups type (Azure#16613)

* Added new Prometheus Rule Groups type

* Added list example

* Added missing brackets

* Added to readme

* Fixed readme

* Added delete example

* Added get example

* Added create example

* Added patch example

* Test

* Fixes

* Added missing brace

* Added rule group name

* Fixed

* Pretier

* Tool fix

* Update readme

* Another prettier fix

* More

* Added system data

* Removed referenced file

* Removed system data

* Added location to patch

* Added back systemdata

* Fixed systemdata

* Changes

* Fixed issue

* Added operations

* CR fixes

* Using common parameters

* Last CR fixes

Author: giladsu