[MM-57295] Bulk export: add roles and permission schemes (#26523)

* Bulk export: add roles and permission schemes

* Update mmctl docs

* Fix log

* Update mmctl tests

* Update mmctl unit tests

* Refactor to avoid extra calls

* Update translations

* Add test case

* Fix test

* Fix test

server/public/model/bulk_export.go

@@ -11,5 +11,6 @@ type BulkExportOpts struct {
 	IncludeAttachments      bool
 	IncludeProfilePictures  bool
 	IncludeArchivedChannels bool
+	IncludeRolesAndSchemes  bool
 	CreateArchive           bool
 }