Add support ORT whisper (#420)
* added support onnxruntime whisper
* Updated decoder export model
* Updated docstring
* updated tests for whisper
* add whisper onnx configs
* Added Whisper model to exporters
* added whisper to exporters
* Removed reduntant code
* Added io binding for ORTModelForSpeechSeq2Seq
* Removed unused imports
* Added tests for exporters and iobinding
* Removed redundant line
* Updated input generator and config
* Updatedtests
* added sample audio input
* Removed redundant code to fix test
* Updated iobinding
* Fix tests
