[MM-12667] Allow including deactivated users in bulk import and export (#10353)

* [MM-12667] Allow including deactivated users in bulk import and export

1. Added `deleteAt` for user type import line
2. Adding deactivated users data in bulk export
3. Importing deactivated users data in bulk import

Added/Updated relevant test cases

* Fixed export of replies to posts by deleted users.
Updated tests for same

store/sqlstore/post_store.go

@@ -1327,7 +1327,6 @@ func (s *SqlPostStore) GetParentsForExportAfter(limit int, afterId string) store
                     AND p1.DeleteAt = 0
 					AND Channels.DeleteAt = 0
 					AND Teams.DeleteAt = 0
-					AND Users.DeleteAt = 0
                 ORDER BY
                     p1.Id
                 LIMIT
@@ -1356,7 +1355,6 @@ func (s *SqlPostStore) GetRepliesForExport(parentId string) store.StoreChannel {
                 WHERE
                     Posts.ParentId = :ParentId
                     AND Posts.DeleteAt = 0
-					AND Users.DeleteAt = 0
                 ORDER BY
                     Posts.Id`,
 			map[string]interface{}{"ParentId": parentId})