SQL: Migrate to use SDK contracts (#36635)

* convert SQLs to use sdk contracts

* make draft

* postgres

* intermedia

* get datasourceinfo filled at the beginning of the service

* move the interval into package because of cyclict  import and fix all postgres tests

* fix mysql test

* fix mssql

* fix the test for pr https://github.com/grafana/grafana/issues/35839

* fix some issue about intervalv2 package

* update sql test

* wire migration for SQLs

* add sqls to the background process

* make it register instead of register and start

* revert formatting

* fix tests

* fix linter

* remove integration test

* Postgres test fix

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

pkg/tsdb/prometheus/prometheus_test.go

@@ -6,7 +6,7 @@ import (
 
 	"github.com/grafana/grafana-plugin-sdk-go/backend"
 	"github.com/grafana/grafana-plugin-sdk-go/data"
-	"github.com/grafana/grafana/pkg/tsdb"
+	"github.com/grafana/grafana/pkg/tsdb/intervalv2"
 	p "github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
 )
@@ -15,7 +15,7 @@ var now = time.Now()
 
 func TestPrometheus(t *testing.T) {
 	service := Service{
-		intervalCalculator: tsdb.NewCalculator(),
+		intervalCalculator: intervalv2.NewCalculator(),
 	}
 
 	t.Run("converting metric name", func(t *testing.T) {