MM-47250: Add new system console section (#21333)

* MM-47250: Add new system console section

We add a new section in system console
for products.

```release-note
Added a new section in system console
for products. For now, it only contains
boards specific settings.
```

* fix unit tests

```release-note
NONE
```

* change comment

```release-note
NONE
```

model/migration.go

@@ -38,4 +38,5 @@ const (
 	MigrationKeyAddPlaybooksPermissions                = "playbooks_permissions"
 	MigrationKeyAddCustomUserGroupsPermissions         = "custom_groups_permissions"
 	MigrationKeyAddPlayboosksManageRolesPermissions    = "playbooks_manage_roles"
+	MigrationKeyAddProductsBoardsPermissions           = "products_boards"
 )