[FEA] Add CPU and GPU telemetry to cuVS Bench

[singhmanas1]

Request to add the following metric per grid point in cuVS Bench-

1. Max RAM / VRAM (in GB)
2. Avg CPU / GPU %

The above should be done seperately for the index build and search phase... so a total of 16 additional columns: max_ram_build_gb, max_ram_search_gb, max_vram_build_gb, max_vram_build_gb
avg_cpu_perc_build, avg_gpu_perc_build, avg_cpu_perc_search, avg_gpu_perc_search.

This would help with-

1. Tradeoffs between search / build perf and memory.
2. Biggest dataset that can be used to build cagra index for a specific GPU SKU.