MM-8810: Add CSV Compliance export (#8966)

* MM-8810: Add CSV Compliance export

* Only allowing to schedule actiances export throught the cli

* De-duplicating some code

* Fixes on texts

* Fixes on translations

utils/file_backend.go

@@ -13,6 +13,7 @@ import (
 type FileBackend interface {
 	TestConnection() *model.AppError
 
+	Reader(path string) (io.ReadCloser, *model.AppError)
 	ReadFile(path string) ([]byte, *model.AppError)
 	CopyFile(oldPath, newPath string) *model.AppError
 	MoveFile(oldPath, newPath string) *model.AppError