Add python backend support

- Modify dockerfile to include bitsandbytes, transformers and latest version of pytorch
- Minor modifications in utils/codegen.py so that same client works with FT and Py-backend
- Minor modifications in launch.sh (no need to name models by GPU)
- Add installation script for adding a new python model (with super simple config_template)
- Modify setup.sh so that it aworks with both FT and Python backend models

Signed-off-by: Parth Thakkar <thakkarparth007@gmail.com>

docker-compose.yaml

@@ -1,11 +1,14 @@
 version: '3.3'
 services:
   triton:
-    image: moyix/triton_with_ft:22.09
+    build:
+      context: .
+      dockerfile: Dockerfile
     command: bash -c "CUDA_VISIBLE_DEVICES=${GPUS} mpirun -n 1 --allow-run-as-root /opt/tritonserver/bin/tritonserver --model-repository=/model"
     shm_size: '2gb'
     volumes:
       - ${MODEL_DIR}:/model
+      - ${HF_CACHE_DIR}:/root/.cache/huggingface
     ports:
       - "8000:8000"
       - "8001:8001"