Interference setup and CUDA benchmarks

[elvingerpaul]

This PR merges all of our changes on the vllm repo including benchmarks into main:

• profiling support for NSYS and NCU profiling for LLM prefill, decode and both
• modify vllm to run in a dedicated CUDA stream
• have an additional stream to run the interference benchmark
• use CUDA green context for inter_sm interference to partition SMs between both vllm stream and interference stream
• paper results + plotting scripts

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