Model Demo changes for tt-buda v0.18.2

[milank94]

No description provided.

[github-actions]

Our automated SPDX license verification process has discovered that the following files are missing a license header:

./model_demos/cv_demos/monodle/pytorch_monodle.py
./model_demos/cv_demos/monodle/utils/model.py
./model_demos/cv_demos/retinanet/model/backbone.py
./model_demos/cv_demos/retinanet/model/model_implementation.py
./model_demos/cv_demos/retinanet/post_process/post_process.py
./model_demos/cv_demos/retinanet/pytorch_retinanet.py
./model_demos/cv_demos/ssd300_resnet50/pytorch_ssd300_resnet50.py
./model_demos/cv_demos/yolo_v6/pytorch_yolov6.py
./model_demos/tests/test_pytorch_monodle.py
./model_demos/tests/test_pytorch_retinanet.py
./model_demos/tests/test_pytorch_ssd300_resnet50.py
./model_demos/tests/test_pytorch_yolov6.py

Please ensure each indicated file includes a valid SPDX license identifier. This is essential for maintaining licensing compliance. Your attention and cooperation in updating these files are greatly appreciated. Thank you.

[github-actions]

Our automated SPDX license verification process has discovered that the following files are missing a license header:

./model_demos/cv_demos/yolo_v6/pytorch_yolov6.py

Please ensure each indicated file includes a valid SPDX license identifier. This is essential for maintaining licensing compliance. Your attention and cooperation in updating these files are greatly appreciated. Thank you.

[anirudTT]

LGTM