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>

app/plugin.go

@@ -16,16 +16,16 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/blang/semver"
+	svg "github.com/h2non/go-is-svg"
+	"github.com/pkg/errors"
+
 	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/model"
 	"github.com/mattermost/mattermost-server/v5/plugin"
 	"github.com/mattermost/mattermost-server/v5/services/filesstore"
 	"github.com/mattermost/mattermost-server/v5/services/marketplace"
 	"github.com/mattermost/mattermost-server/v5/utils/fileutils"
-
-	"github.com/blang/semver"
-	svg "github.com/h2non/go-is-svg"
-	"github.com/pkg/errors"
 )
 
 const prepackagedPluginsDir = "prepackaged_plugins"