goimports (#16640)

* format using `goimports -local github.com/mattermost/mattermost-server/v5 -w`

* added goimports lint check to .golangci.yml

* format using `goimports -local github.com/mattermost/mattermost-server/v5 -w` for a corner case

* make app-layers, *-mocks and store-layers for ci check

Co-authored-by: Mahmudul Haque <mahmudulhaque@protonmail.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

utils/archive_test.go

@@ -11,9 +11,9 @@ import (
 	"path/filepath"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v5/utils/fileutils"
-
 	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v5/utils/fileutils"
 )
 
 func TestSanitizePath(t *testing.T) {

utils/html.go

@@ -15,6 +15,7 @@ import (
 
 	"github.com/fsnotify/fsnotify"
 	"github.com/mattermost/go-i18n/i18n"
+
 	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/utils/fileutils"
 )

utils/i18n.go

@@ -12,6 +12,7 @@ import (
 	"strings"
 
 	"github.com/mattermost/go-i18n/i18n"
+
 	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/utils/fileutils"

utils/imgutils/gif_test.go

@@ -7,9 +7,10 @@ import (
 	"bytes"
 	"testing"
 
-	"github.com/mattermost/mattermost-server/v5/utils/testutils"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+
+	"github.com/mattermost/mattermost-server/v5/utils/testutils"
 )
 
 func TestCountFrames(t *testing.T) {

utils/markdown/lines.go

@@ -3,7 +3,9 @@
 
 package markdown
 
-import "strings"
+import (
+	"strings"
+)
 
 type Line struct {
 	Range

utils/utils.go

@@ -4,12 +4,13 @@
 package utils
 
 import (
-	"github.com/pkg/errors"
 	"io/ioutil"
 	"net"
 	"net/http"
 	"net/url"
 	"strings"
+
+	"github.com/pkg/errors"
 )
 
 func StringInSlice(a string, slice []string) bool {