update prometheus query editor doc (#68595)
* initial updates to outdated info
* minor edits prior to draft PR
* commented out options no longer available
* additional edits
* removed tables, changed format to list
* updated code mode section
* finished edits to builder mode
* added revisions per Brendan
* removed commented out section
* added note short codes
(cherry picked from commit 3edeafa663)
Co-authored-by: lwandz13 <126723338+lwandz13@users.noreply.github.com>