feat(txpool): add IntoIterator for AllPoolTransactions (#21241)

crates/transaction-pool/src/traits.rs

@@ -746,6 +746,18 @@ impl<T: PoolTransaction> Default for AllPoolTransactions<T> {
     }
 }
 
+impl<T: PoolTransaction> IntoIterator for AllPoolTransactions<T> {
+    type Item = Arc<ValidPoolTransaction<T>>;
+    type IntoIter = std::iter::Chain<
+        std::vec::IntoIter<Arc<ValidPoolTransaction<T>>>,
+        std::vec::IntoIter<Arc<ValidPoolTransaction<T>>>,
+    >;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.pending.into_iter().chain(self.queued)
+    }
+}
+
 /// Represents transactions that were propagated over the network.
 #[derive(Debug, Clone, Eq, PartialEq, Default)]
 pub struct PropagatedTransactions(pub HashMap<TxHash, Vec<PropagateKind>>);