Unified Storage: Records grafana database metrics (#91932)

* records grafana database metrics for unified storage

* update type to tracing.Tracer

* use nil for tracer in tests

pkg/storage/unified/sql/db/dbimpl/dbimpl.go

@@ -6,8 +6,8 @@ import (
 	"sync"
 
 	"github.com/dlmiddlecote/sqlstats"
+	"github.com/grafana/grafana/pkg/infra/tracing"
 	"github.com/prometheus/client_golang/prometheus"
-	"go.opentelemetry.io/otel/trace"
 	"xorm.io/xorm"
 
 	infraDB "github.com/grafana/grafana/pkg/infra/db"
@@ -23,7 +23,7 @@ const (
 	dbTypePostgres = "postgres"
 )
 
-func ProvideResourceDB(grafanaDB infraDB.DB, cfg *setting.Cfg, features featuremgmt.FeatureToggles, tracer trace.Tracer) (db.DBProvider, error) {
+func ProvideResourceDB(grafanaDB infraDB.DB, cfg *setting.Cfg, features featuremgmt.FeatureToggles, tracer tracing.Tracer) (db.DBProvider, error) {
 	p, err := newResourceDBProvider(grafanaDB, cfg, features, tracer)
 	if err != nil {
 		return nil, fmt.Errorf("provide Resource DB: %w", err)
@@ -54,7 +54,7 @@ type resourceDBProvider struct {
 	logQueries      bool
 }
 
-func newResourceDBProvider(grafanaDB infraDB.DB, cfg *setting.Cfg, features featuremgmt.FeatureToggles, tracer trace.Tracer) (p *resourceDBProvider, err error) {
+func newResourceDBProvider(grafanaDB infraDB.DB, cfg *setting.Cfg, features featuremgmt.FeatureToggles, tracer tracing.Tracer) (p *resourceDBProvider, err error) {
 	// TODO: This should be renamed resource_api
 	getter := &sectionGetter{
 		DynamicSection: cfg.SectionWithEnvOverrides("resource_api"),