add stable diffusion tensorrt img2img pipeline (#3419)
* add stable diffusion tensorrt img2img pipeline
Signed-off-by: Asfiya Baig <asfiyab@nvidia.com>
* update docstrings
Signed-off-by: Asfiya Baig <asfiyab@nvidia.com>
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Signed-off-by: Asfiya Baig <asfiyab@nvidia.com>