MM-25478: Migrate compliancestore to plain error (#15074)

* ComplianceStore migration

* Fix imports

* Added one string

* fix go.tools.mod

Co-authored-by: Rodrigo Villablanca <villa061004@gmail.com>
Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

go.tools.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/jstemmer/go-junit-report v0.9.1 // indirect
-	github.com/mattermost/mattermost-utilities/mmgotool v0.0.0-20200720080147-779d19605c57 // indirect
+	github.com/mattermost/mattermost-utilities/mmgotool v0.0.0-20200721093743-053c38dcd293 // indirect
 	github.com/reflog/struct2interface v0.6.1 // indirect
 	github.com/vektra/mockery v1.1.2 // indirect
 )