Fix opencl dependencies in openvino.Dockerfile

[vabenil]

Overview

When following the instructions in build instructions. Specifically those for running the llama-server in docker:

docker build --target=server -t llama-openvino:server -f .devops/openvino.Dockerfile .

I ran into the issue of missing opencl dependencies.

I then simply copied the dependencies from the same build instructions here

sudo apt install ocl-icd-opencl-dev opencl-headers opencl-clhpp-headers intel-opencl-icd

Into the Dockerfile.

After applying this changes the docker image gets built successfully.