GitLab

* Add onnx support for VisionEncoderDecoder

* Add onnx support for VisionEncoderDecoder

* Removed unused import

* Rename encoder hidden state
Co-authored-by: lewtun <lewis.c.tunstall@gmail.com>

* Update docstrings and removed redundant code

* Added test function for enc-dec models

* Update doc string text
Co-authored-by: lewtun <lewis.c.tunstall@gmail.com>

* fixed code style
Co-authored-by: lewtun <lewis.c.tunstall@gmail.com>