Add availability to alter $exclude_field_types and $exclude_field_names

Thanks for this.

I needed this feature to exclude a webform reference field which needs to stay translatable so it can be changed from a translation to another.
Without excluding it I had an error while TMGMT was translating the target_id and other elements in the reference field.

Attach is the patch from the MR so it can ben added through composer whitout including further change from the MR.