Add store split for Get Dashboard version method (#49138)

* Add store split for Get Dashboard version method

* Implement dashboard version service

* Fix api tests

* Remove GetDashboarVersion from sqlstore

* Add fakes for Get dashboard version

* Fix sqlstore test

* Add Get Dashboard store test

* Add dashver service test

* Remove useless comments

pkg/services/sqlstore/dashboard_version_test.go

@@ -5,7 +5,6 @@ package sqlstore
 
 import (
 	"context"
-	"reflect"
 	"testing"
 	"time"
 
@@ -78,46 +77,6 @@ func updateTestDashboard(t *testing.T, sqlStore *SQLStore, dashboard *models.Das
 	require.NoError(t, err)
 }
 
-func TestIntegrationGetDashboardVersion(t *testing.T) {
-	sqlStore := InitTestDB(t)
-
-	t.Run("Get a Dashboard ID and version ID", func(t *testing.T) {
-		savedDash := insertTestDashboard(t, sqlStore, "test dash 26", 1, 0, false, "diff")
-
-		query := models.GetDashboardVersionQuery{
-			DashboardId: savedDash.Id,
-			Version:     savedDash.Version,
-			OrgId:       1,
-		}
-
-		err := sqlStore.GetDashboardVersion(context.Background(), &query)
-		require.Nil(t, err)
-		require.Equal(t, query.DashboardId, savedDash.Id)
-		require.Equal(t, query.Version, savedDash.Version)
-
-		dashCmd := &models.Dashboard{
-			Uid:   savedDash.Uid,
-			OrgId: savedDash.OrgId,
-		}
-		err = getDashboard(t, sqlStore, dashCmd)
-		require.Nil(t, err)
-		eq := reflect.DeepEqual(dashCmd.Data, query.Result.Data)
-		require.Equal(t, true, eq)
-	})
-
-	t.Run("Attempt to get a version that doesn't exist", func(t *testing.T) {
-		query := models.GetDashboardVersionQuery{
-			DashboardId: int64(999),
-			Version:     123,
-			OrgId:       1,
-		}
-
-		err := sqlStore.GetDashboardVersion(context.Background(), &query)
-		require.Error(t, err)
-		require.Equal(t, models.ErrDashboardVersionNotFound, err)
-	})
-}
-
 func TestIntegrationGetDashboardVersions(t *testing.T) {
 	sqlStore := InitTestDB(t)
 	savedDash := insertTestDashboard(t, sqlStore, "test dash 43", 1, 0, false, "diff-all")