use op-alloy genesis types for genesis parsing

[mattsse]

op-alloy-rpc-types https://crates.io/crates/op-alloy-rpc-types/0.1.1 crate now has these types:

reth/crates/chainspec/src/spec.rs

Lines 1084 to 1104 in d41aac3

	#[cfg(feature = "optimism")]
	#[derive(Default, Debug, serde::Deserialize)]
	#[serde(rename_all = "camelCase")]
	struct OptimismGenesisInfo {
	bedrock_block: Option<u64>,
	regolith_time: Option<u64>,
	canyon_time: Option<u64>,
	ecotone_time: Option<u64>,
	fjord_time: Option<u64>,
	#[serde(skip)]
	base_fee_params: BaseFeeParamsKind,
	}
	#[cfg(feature = "optimism")]
	#[derive(Debug, Eq, PartialEq, serde::Deserialize)]
	#[serde(rename_all = "camelCase")]
	struct OptimismBaseFeeInfo {
	eip1559_elasticity: Option<u64>,
	eip1559_denominator: Option<u64>,
	eip1559_denominator_canyon: Option<u64>,
	}

TODO

• replace those with op-alloy-rpc-types and simplify genesis setup:

reth/crates/chainspec/src/spec.rs

Line 733 in d41aac3

let optimism_genesis_info = OptimismGenesisInfo::extract_from(&genesis);

unblocks more progress for #9266

FYI @loocapro

[qiweiii]

I can take this!

is it just replace? how does it simplify the setup?

[mattsse]

thanks @qiweiii

there's already a pr for #9292
if you're looking for something else, I opened a few new good first issues