Reuse op-alloy genesis params extract support

[mattsse]

Describe the feature

we now have OptimismChainInfo in op-alloy

https://github.com/alloy-rs/op-alloy/blob/8dd56a6b93d400f57966220507beeacacda8fb59/crates/rpc-types/src/genesis.rs#L7-L14

and we still have this helper type here:

reth/crates/chainspec/src/spec.rs

Lines 1097 to 1105 in 0349d7b

	/// Genesis info for Optimism.
	#[cfg(feature = "optimism")]
	#[derive(Default, Debug, serde::Deserialize)]
	#[serde(rename_all = "camelCase")]
	struct OptimismGenesisInfo {
	optimism_chain_info: op_alloy_rpc_types::genesis::OptimismChainInfo,
	#[serde(skip)]
	base_fee_params: BaseFeeParamsKind,
	}

which also does extract:

reth/crates/chainspec/src/spec.rs

Line 1109 in 0349d7b

fn extract_from(genesis: &Genesis) -> Self {

this type is more or less useless:

reth/crates/chainspec/src/spec.rs

Line 1101 in 0349d7b

struct OptimismGenesisInfo {

and only does the BaseFeeParamsKind extraction, I feel like this can be made a bit nicer

@klkvr could be something to take on once we extracted OpChainSpec

Additional context

No response