Add figure cache_hits_prefix-sharing-2pool-128.png

Add figure pareto_prefix-sharing-2pool-128.png

Add figure p99_ttft_prefix-sharing-2pool-128.png

Add figure throughput_prefix-sharing-2pool-128.png

Add figure cache_hits_prefix-sharing-3pool.png

Add figure pareto_prefix-sharing-3pool.png

Add figure p99_ttft_prefix-sharing-3pool.png

Add figure throughput_prefix-sharing-3pool.png