Chore: Add tracing to tempo, parca and pyroscope datasource backends (#76368)

* Added spans to trace.go

* Added spans to search_stream.go

* Added spans to parca datasource

* Added spans for pyroscope

* Fix tests

* Fix another test

* Lint

* Revert "Fix another test"

This reverts commit a1639049e3.

* Use grafana-sdk-go tracing

pkg/tsdb/grafana-pyroscope-datasource/instance.go

@@ -10,9 +10,12 @@ import (
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/backend/instancemgmt"
+	"github.com/grafana/grafana-plugin-sdk-go/backend/tracing"
 	"github.com/grafana/grafana-plugin-sdk-go/data"
 	"github.com/grafana/grafana/pkg/infra/httpclient"
 	"github.com/grafana/grafana/pkg/services/accesscontrol"
+	"go.opentelemetry.io/otel/attribute"
+	"go.opentelemetry.io/otel/trace"
 )
 
 var (
@@ -58,6 +61,8 @@ func NewPyroscopeDatasource(httpClientProvider httpclient.Provider, settings bac
 }
 
 func (d *PyroscopeDatasource) CallResource(ctx context.Context, req *backend.CallResourceRequest, sender backend.CallResourceResponseSender) error {
+	ctx, span := tracing.DefaultTracer().Start(ctx, "datasource.pyroscope.CallResource", trace.WithAttributes(attribute.String("path", req.Path), attribute.String("method", req.Method)))
+	defer span.End()
 	logger.Debug("CallResource", "Path", req.Path, "Method", req.Method, "Body", req.Body)
 	if req.Path == "profileTypes" {
 		return d.profileTypes(ctx, req, sender)