[WIP] Add type hints for Lxmert (TF) (#19441)
* Add type hints for Lxmert (TF)
* Update src/transformers/models/lxmert/modeling_tf_lxmert.py
Co-authored-by: Emmanuel Lusenji <elusenji@Emmanuels-MacBook-Pro.local>
Co-authored-by: Matt <Rocketknight1@users.noreply.github.com>
