Fix `AutoModel.from_pretrained` not restoring `modules_to_save` weights (#48595)
Fix PEFT `modules_to_save` weights not restored
The module key mapping returned by
`peft.utils.other.AuxiliaryTrainingWrapper.adapter_state_dict_load_map`
is required to correctly load `modules_to_save` modules
(`peft.utils.other.ModulesToSaveWrapper`), but was previously ignored by
the PEFT integration.