Clone + Debug on Payloads/Addresses, and compare child storage results (#1203)

* Clone + Debug on Payloads/Addresses, and compare child storage results

* , to .

* clippy and fixes

* fix

* use derivative instead to remove boilerplate impls

* add missing import

* tidy up and extend wasm test timeout

* try 5 mins instead of 2

testing/wasm-lightclient-tests/tests/wasm.rs

@@ -1,7 +1,8 @@
 #![cfg(target_arch = "wasm32")]
 
-use subxt::{config::PolkadotConfig,
-    client::{LightClient, OfflineClientT, LightClientBuilder},
+use subxt::{
+    config::PolkadotConfig,
+    client::{LightClient, LightClientBuilder},
 };
 use futures_util::StreamExt;
 use wasm_bindgen_test::*;