Remove codec::Encode and codec::Decode derives from generated APIs by default (#2008)

* Remove codec::Encode and codec::Decode from generated APIs by default

* clippy fixes

* clippy

* More fixes, and CompactAs only if Encode/Decode

* revert println in example

* fix lightclient test

* fix docs

* Fix another rust doc comment

* Fix failing storage test

* Remove now-unnecessary test

* clippy

* clippy

* Remove pointless clone

subxt/src/storage/storage_type.rs

@@ -95,7 +95,7 @@ where
     /// let api = OnlineClient::<PolkadotConfig>::new().await.unwrap();
     ///
     /// // Address to a storage entry we'd like to access.
-    /// let address = polkadot::storage().xcm_pallet().queries(&12345);
+    /// let address = polkadot::storage().xcm_pallet().queries(12345);
     ///
     /// // Fetch just the keys, returning up to 10 keys.
     /// let value = api