Add a test parsing transaction with a huge witness

This transaction broke past versions of `rust-bitcoin` and LND so this
adds a test to avoid reintroducing the problem in the future.

See also https://github.com/romanz/electrs/issues/783

bitcoin/src/blockdata/transaction.rs

@@ -1343,6 +1343,12 @@ mod tests {
         }
     }
 
+    #[test]
+    fn test_huge_witness() {
+        use crate::hashes::hex::FromHex;
+        deserialize::<Transaction>(&Vec::from_hex(include_str!("../../tests/data/huge_witness.hex").trim()).unwrap()).unwrap();
+    }
+
     #[test]
     #[cfg(feature="bitcoinconsensus")]
     fn test_transaction_verify () {