proxyd: support eth_sendRawTransactionSync #18522
Description
See discussion here, but the tldr is that this cuts the number of networking roundtrips down when submitting a transaction, decreasing the latency of tx confirmation in particular for chains that have fast blocktimes.
It has been merged into geth in ethereum/go-ethereum#32830. There is viem support for this method, would be good to have strong support in OP Stack and have applications start migrating to it to decrease latency