Add proper test Custom values (#1147)

* add proper tests for custom values

* remove try operators

* use sustrate compat for import of hash

* add license and hex

* add script to artifacts.sh

* custom values with ids not in metadata can be accessed in static interface

* fmt and clippy

* access bytes of custom values directly, even if type id wrong

* final fixes

* removing substrate-compat flag from ui tests

* Update subxt/src/custom_values/custom_values_client.rs

Co-authored-by: James Wilson <james@jsdw.me>

* remove types access in type generator

* 2 extra lines

---------

Co-authored-by: James Wilson <james@jsdw.me>

subxt/src/utils/mod.rs

@@ -30,7 +30,7 @@ pub use primitive_types::{H160, H256, H512};
 
 /// Wraps an already encoded byte vector, prevents being encoded as a raw byte vector as part of
 /// the transaction payload
-#[derive(Clone, Debug, Eq, PartialEq, Decode)]
+#[derive(Clone, Debug, Eq, PartialEq)]
 pub struct Encoded(pub Vec<u8>);
 
 impl codec::Encode for Encoded {