What is this?

To have the Graphite data source respect each target's time range when there are multiple queries run in Alerting with Expressions using the sseGroupByDatasource feature toggle on.

Context and why we are doing this:

Graphite allows one time range per request and applies this same range to all targets(queries) in the request.

Challenge: Alerting allows multiple time ranges when there are multiple queries. Expressions has a feature toggle that would benefit other data sources that have queries that rely on other queries and should all be run together, sseGroupByDatasource. When this toggle is turned on, it breaks Graphite's respect to the time range because of how Graphite backend was built originally, to make one request with all the same time range.

See See https://github.com/grafana/support-escalations/issues/9529 for more detail.