Implement alloy Encodable2718 and Decodable2718 for reth transaction types

[mattsse]

Describe the feature

currently we use our own native functions for:

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

Lines 1195 to 1213 in 68d76f6

	/// Returns the enveloped encoded transactions.
	///
	/// See also [`TransactionSigned::encode_enveloped`]
	pub fn envelope_encoded(&self) -> Bytes {
	let mut buf = Vec::new();
	self.encode_enveloped(&mut buf);
	buf.into()
	}
	/// Encodes the transaction into the "raw" format (e.g. `eth_sendRawTransaction`).
	/// This format is also referred to as "binary" encoding.
	///
	/// For legacy transactions, it encodes the RLP of the transaction into the buffer:
	/// `rlp(tx-data)`
	/// For EIP-2718 typed it encodes the type of the transaction followed by the rlp of the
	/// transaction: `tx-type || rlp(tx-data)`
	pub fn encode_enveloped(&self, out: &mut dyn bytes::BufMut) {
	self.encode_inner(out, false)
	}

we will move more things to alloy traits and encoding is one thing so we should transition this already to alloy's traits

TODO:

• replace reth envelope functions with trait impl

easiest way to update this across the codebase is to first rename the reth function, then impl the trait and remove reth function, then import trait where this is called

Additional context

No response