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>

einterfaces/account_migration.go

@@ -3,7 +3,9 @@
 
 package einterfaces
 
-import "github.com/mattermost/mattermost-server/v5/model"
+import (
+	"github.com/mattermost/mattermost-server/v5/model"
+)
 
 type AccountMigrationInterface interface {
 	MigrateToLdap(fromAuthService string, forignUserFieldNameToMatch string, force bool, dryRun bool) *model.AppError

einterfaces/jobs/cloud_interface.go

@@ -3,7 +3,9 @@
 
 package jobs
 
-import "github.com/mattermost/mattermost-server/v5/model"
+import (
+	"github.com/mattermost/mattermost-server/v5/model"
+)
 
 type CloudJobInterface interface {
 	MakeWorker() model.Worker

einterfaces/metrics.go

@@ -3,7 +3,9 @@
 
 package einterfaces
 
-import "github.com/mattermost/logr"
+import (
+	"github.com/mattermost/logr"
+)
 
 type MetricsInterface interface {
 	StartServer()