[evm] Get block receipts rather than batch call

BSC only for now

BSC uses a non-standard name eth_getTransactionReceiptsByBlockNumber

go-ethereum merged new method eth_getBlockReceipts in August 2023 https://www.quicknode.com/docs/ethereum/eth_getBlockReceipts

AVAX does not yet support either variety.

This PR also tools up ETH and placeholder for AVAX, once either are ready.