Adding mattermost-govet to the pipeline (#13257)

* Adding mattermost-govet to the pipeline

* Trying to fix circleCI config

* Trying to fix circleCI config

* Trying to fix circleCI config

* Trying to fix circleCI config

* Update Makefile

Co-Authored-By: Ben Schumacher <ben.schumacher@mattermost.com>

* Update Makefile

Co-Authored-By: Ben Schumacher <ben.schumacher@mattermost.com>

* Addressing PR review comments

* Addressing PR review comments

* Addressing PR review comments

* Addressing PR review comments

* Addressing PR review comments

* Addressing PR review comments

* Adding legacy check-licenses task to legacy.mk

* Removing unnecesary GO111MODULE=off lines

* Adding jenkins mattermost-govet installation

store/localcachelayer/team_layer.go

@@ -1,5 +1,5 @@
-// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
-// See License.txt for license information.
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
 
 package localcachelayer
 

store/localcachelayer/team_layer_test.go

@@ -1,5 +1,5 @@
-// Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
-// See License.txt for license information.
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
 
 package localcachelayer