Benchmarking for SC

[samricotta]

As benchmarking has been a key piece of work within the SC with the process of choosing the implementation (current IAVL, memIAVL, IAVL v1)

For more information on the benchmarking that has been currently done:
https://github.com/kocubinski/iavl-bench

Tasks

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1. Benchmark data generator utility #17580
   C:Store T: Performance WG: Storage +3
   
2. Pruning impl for iavl v1
3. RMS that ties in SC SS for benchmarking

[alexanderbez]

@kocubinski do you want to close this once we have IAVL v2 wrapped up?