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>

model/auditconv.go

@@ -3,7 +3,9 @@
 
 package model
 
-import "github.com/francoispqt/gojay"
+import (
+	"github.com/francoispqt/gojay"
+)
 
 // AuditModelTypeConv converts key model types to something better suited for audit output.
 func AuditModelTypeConv(val interface{}) (newVal interface{}, converted bool) {