Prover: add `verify_log_entry_in_bound` api #894

Job	Run time
build all rust contracts	7m 57s
test eth-prover	3m 48s
test eth-client	6m 24s
test eth2-client	5m 42s
test eth2near/contract_wrapper	3m 43s
test eth2near/finality-update-verify	2m 30s
test eth2near/eth2-to-near-block-relay-rs	2m 14s
test eth2near/eth2-contract-init	2m 32s
test eth2near/eth_rpc_client	2m 14s
	37m 4s

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