[Feature] Make TxEnvelope generic over Eip4844 variant

[klkvr]

Component

consensus, eips, genesis

Describe the feature you would like

We need to do the same change as #2162 for TxEnvelope.

The steps are:

1. Introduce EthereumTxEnvelope<Eip4844> type and type alias TxEnvelope = EthereumTxEnvelope<TxEip4844Variant>
2. Change all TxEnvelope impls to generic impls on EthereumTxEnvelope instead
3. Replace PooledTransaction with type alias PooledTransaction = TxEnvelope<TxEip4844WithSidecar>

   alloy/crates/consensus/src/transaction/pooled.rs

   Lines 32 to 43 in 9442fef

   	pub enum PooledTransaction {
   	/// An untagged [`TxLegacy`].
   	Legacy(Signed<TxLegacy>),
   	/// A [`TxEip2930`] tagged with type 1.
   	Eip2930(Signed<TxEip2930>),
   	/// A [`TxEip1559`] tagged with type 2.
   	Eip1559(Signed<TxEip1559>),
   	/// A EIP-4844 transaction, which includes the transaction, blob data, commitments, and proofs.
   	Eip4844(Signed<TxEip4844WithSidecar>),
   	/// A [`TxEip7702`] tagged with type 4.
   	Eip7702(Signed<TxEip7702>),
   	}

Additional context

No response

[Rimeeeeee]

May I look on this