Moving mlog to corelibs (#16915)

* Moving mlog to corelibs

* Regenerating app layers

* Fix golangci-lint problem

* Fixing golangci-lint errors

* Renaming from corelibs to shared

* Renaming from corelibs to shared

* Fixing import

* Fixing merge problems

* Fixing build

app/command_autocomplete.go

@@ -10,8 +10,8 @@ import (
 	"sort"
 	"strings"
 
-	"github.com/mattermost/mattermost-server/v5/mlog"
 	"github.com/mattermost/mattermost-server/v5/model"
+	"github.com/mattermost/mattermost-server/v5/shared/mlog"
 )
 
 // AutocompleteDynamicArgProvider dynamically provides auto-completion args for built-in commands.