GitLab

* Use return_loss for BridgeTowerForContrastiveLearning, add example

* fix tests

* Update example in BridgeTowerForContrastiveLearning

* Update test_modeling_bridgetower.py

* update model output format

* minor update

* Update src/transformers/models/bridgetower/modeling_bridgetower.py

* make style

---------
Co-authored-by: Tiep Le <97980157+tileintel@users.noreply.github.com>
Co-authored-by: Tiep Le <tiep.le@intel.com>
Co-authored-by: Yih-Dar <2521628+ydshieh@users.noreply.github.com>
Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>