* op-node: ParseWithdrawalInitiated improvements

`ParseWithdrawalInitiated` used to pass every log to `abi.EventByID`. Since `abi.EventByID` was bound to the `L2ToL1MessagePasser` contract, any logs on the receipt from a different contract would cause this function to return an error. This breaks support for parsing withdrawal events initiated by the `L2StandardBridge`, since the bridge adds many events of its own. This PR updates `ParseWithdrawalInitiated` to use the hex-encoded withdrawal intiated topic to determine which log messages to use instead.

* add extension 1

* Update op-node/withdrawals/utils.go
Co-authored-by: protolambda <proto@protolambda.com>

* Update op-node/withdrawals/utils.go
Co-authored-by: protolambda <proto@protolambda.com>

* Update op-node/withdrawals/utils.go
Co-authored-by: protolambda <proto@protolambda.com>

* add docstring

* use shared lib
Co-authored-by: protolambda <proto@protolambda.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>