Pyroscope: Annotation support for series queries (#104130)

* Pyroscope: Add annotations frame to series response

* Adapt to API change, add tests

* Run make lint-go

* Fix conflicts after rebase

* Add annotation via a separate data frame

* Process annotations fully at the datasource

* Add mod owner for go-humanize

* Pyroscope: Annotations in Query Response can be optional

---------

Co-authored-by: Piotr Jamróz <pm.jamroz@gmail.com>

pkg/tsdb/grafana-pyroscope-datasource/kinds/dataquery/types_dataquery_gen.go

@@ -41,6 +41,8 @@ type GrafanaPyroscopeDataQuery struct {
 	// Specify the query flavor
 	// TODO make this required and give it a default
 	QueryType *string `json:"queryType,omitempty"`
+	// If set to true, the response will contain annotations
+	Annotations *bool `json:"annotations,omitempty"`
 	// For mixed data sources the selected datasource is on the query level.
 	// For non mixed scenarios this is undefined.
 	// TODO find a better way to do this ^ that's friendly to schema