Revert "moving to opt foider to pick up binary even if local mounted"

This reverts commit b5f3fe10.

container/Dockerfile.vllm

@@ -367,7 +367,7 @@ RUN --mount=type=bind,source=./container/launch_message.txt,target=/workspace/la
     echo "cat ~/.launch_screen" >> ~/.bashrc
 
 # Tell vllm to use the Dynamo LLM C API for KV Cache Routing
-ENV VLLM_KV_CAPI_PATH=/opt/dynamo/bindings/lib/libdynamo_llm_capi.so
+ENV VLLM_KV_CAPI_PATH=$CARGO_TARGET_DIR/release/libdynamo_llm_capi.so
 
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