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>

codegen/src/types/derives.rs

@@ -59,10 +59,7 @@ impl DerivesRegistry {
         derives: impl IntoIterator<Item = syn::Path>,
         attributes: impl IntoIterator<Item = syn::Attribute>,
     ) {
-        let type_derives = self
-            .specific_type_derives
-            .entry(ty)
-            .or_insert_with(Derives::new);
+        let type_derives = self.specific_type_derives.entry(ty).or_default();
         type_derives.derives.extend(derives);
         type_derives.attributes.extend(attributes);
     }