perf(state-transition): add caches for indexed pending deposits by pubkey and verified counts#9247

guha-rahul wants to merge 2 commits intoChainSafe:unstableChainSafe/lodestar:unstablefrom

guha-rahul:perf/pending-deposit-sig-cacheguha-rahul/lodestar:perf/pending-deposit-sig-cacheCopy head branch name to clipboard