fix: prevent decoding U256 TxValue on mainnet

[Rjected]

This prevents TxValues larger than U256 from being decoded when the optimism feature is not enabled. This means there is no chance of the node decoding a transaction with a TxValue larger than U256, and attempting to commit that value in the DB, which would panic from the to conversion:

reth/crates/primitives/src/transaction/tx_value.rs

Lines 73 to 76 in db11909

	#[cfg(not(feature = "optimism"))]
	{
	self.0.to::<u128>().to_compact(buf)
	}