Chore: Implement OpenTelemtry in Grafana (#42674)

* Separate Tracer interface to TracerService and Tracer

* Fix lint

* Fix:Make it possible to start spans for both opentracing and opentelemetry in ds proxy

* Add span methods, use span interface for rest of tracing

* Fix logs in tracing

* Fix tests that are related to tracing

* Fix resourcepermissions test

* Fix some tests

* Fix more tests

* Add TracingService to wire cli runner

* Remove GlobalTracer from bus

* Renaming test function

* Remove GlobalTracer from TSDB

* Replace GlobalTracer in api

* Adjust tests to the InitializeForTests func

* Remove GlobalTracer from services

* Remove GlobalTracer

* Remove bus.NewTest

* Remove Tracer interface

* Add InitializeForBus

* Simplify tests

* Clean up tests

* Rename TracerService to Tracer

* Update pkg/middleware/request_tracing.go

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

* Initialize tracer before passing it to SQLStore initialization in commands

* Remove tests for opentracing

* Set span attributes correctly, remove unnecessary trace initiliazation form test

* Add tracer instance to newSQLStore

* Fix changes due to rebase

* Add modified tracing middleware test

* Fix opentracing implementation tags

Co-authored-by: Marcus Efraimsson <marcus.efraimsson@gmail.com>

pkg/tsdb/cloudmonitoring/cloudmonitoring.go

@@ -24,6 +24,7 @@ import (
 
 	"github.com/grafana/grafana/pkg/infra/httpclient"
 	"github.com/grafana/grafana/pkg/infra/log"
+	"github.com/grafana/grafana/pkg/infra/tracing"
 	"github.com/grafana/grafana/pkg/plugins"
 	"github.com/grafana/grafana/pkg/plugins/backendplugin/coreplugin"
 	"github.com/grafana/grafana/pkg/services/datasources"
@@ -72,12 +73,13 @@ const (
 )
 
 func ProvideService(cfg *setting.Cfg, httpClientProvider httpclient.Provider, pluginStore plugins.Store,
-	dsService *datasources.Service) *Service {
+	dsService *datasources.Service, tracer tracing.Tracer) *Service {
 	s := &Service{
 		httpClientProvider: httpClientProvider,
 		cfg:                cfg,
 		im:                 datasource.NewInstanceManager(newInstanceSettings(httpClientProvider)),
 		dsService:          dsService,
+		tracer:             tracer,
 	}
 
 	mux := http.NewServeMux()
@@ -139,6 +141,7 @@ type Service struct {
 	cfg                *setting.Cfg
 	im                 instancemgmt.InstanceManager
 	dsService          *datasources.Service
+	tracer             tracing.Tracer
 }
 
 type QueryModel struct {
@@ -263,7 +266,7 @@ func (s *Service) executeTimeSeriesQuery(ctx context.Context, req *backend.Query
 	}
 
 	for _, queryExecutor := range queryExecutors {
-		queryRes, dr, executedQueryString, err := queryExecutor.run(ctx, req, s, dsInfo)
+		queryRes, dr, executedQueryString, err := queryExecutor.run(ctx, req, s, dsInfo, s.tracer)
 		if err != nil {
 			return resp, err
 		}