feat(4337): Enforce ConditionalOptions check during payload building

[0xKitsune]

This PR updates the payload builder to enforce any pooled transaction with ConditionalOptions clear validation before including the tx into the payload. In the current implementation, all transactions that fail conditional options checks will be removed from the mempool.

// --snip--
  while let Some(pool_tx) = best_txs.next() {
        if let Some(conditional_options) = pool_tx.transaction.conditional_options() {
            if let Err(_) = validate_conditional_options(conditional_options, &client) {
                best_txs.mark_invalid(&pool_tx);
                invalid_txs.push(pool_tx.hash().clone());
                continue;
            }
        }

// --snip--
 if !invalid_txs.is_empty() {
   pool.remove_transactions(invalid_txs);
}

[0xOsiris]

Looks good, just one improvement I think we can make!