Chore: Fix goimports order in RelEng packages (#62481)

fix goimports order

pkg/build/git/git.go

@@ -8,8 +8,9 @@ import (
 	"regexp"
 
 	"github.com/google/go-github/v45/github"
-	"github.com/grafana/grafana/pkg/build/stringutil"
 	"golang.org/x/oauth2"
+
+	"github.com/grafana/grafana/pkg/build/stringutil"
 )
 
 const (

pkg/build/git/git_checks_test.go

@@ -6,8 +6,9 @@ import (
 	"testing"
 
 	"github.com/google/go-github/v45/github"
-	"github.com/grafana/grafana/pkg/build/git"
 	"github.com/stretchr/testify/require"
+
+	"github.com/grafana/grafana/pkg/build/git"
 )
 
 type TestChecksService struct {

pkg/build/git/git_issues_test.go

@@ -6,8 +6,9 @@ import (
 	"testing"
 
 	"github.com/google/go-github/v45/github"
-	"github.com/grafana/grafana/pkg/build/git"
 	"github.com/stretchr/testify/require"
+
+	"github.com/grafana/grafana/pkg/build/git"
 )
 
 type TestLabelsService struct {

pkg/build/git/git_test.go

@@ -3,8 +3,9 @@ package git_test
 import (
 	"testing"
 
-	"github.com/grafana/grafana/pkg/build/git"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/grafana/grafana/pkg/build/git"
 )
 
 func TestPRCheckRegexp(t *testing.T) {