178b2ea0e5
Improves SQL data sources documentation in regards to Grafana 8 changes
and adds some additional upgrade notes in regards to this.
Ref #35390
Ref #38666
Co-authored-by: achatterjee-grafana <70489351+achatterjee-grafana@users.noreply.github.com>
(cherry picked from commit 0bb7d50ad6)