fix: resolve cargo-clippy CI errors in vendor crates

- Fix rebrand issues in pezkuwi-subxt signer (sp_core -> pezsp_core,
  sp_keyring -> pezsp_keyring, sp_runtime -> pezsp_runtime)
- Fix pezkuwi-zombienet-sdk tests (subxt::PolkadotConfig ->
  pezkuwi_subxt::PezkuwiConfig)
- Correct artifact paths in subxt examples (polkadot_metadata_*.scale)
- Fix type conversion issues in subxt examples (explicit constructors
  instead of .into() for generated types)
- Add pezkuwi-subxt-utils-stripmetadata dev-dependency to metadata crate
- Use original polkadot module from external frame-decode crate
- Fix Display trait usage for generated AccountId32 types

vendor/pezkuwi-subxt/subxt/src/backend/mod.rs

@@ -468,7 +468,7 @@ mod test {
 					// Decode the storage key as first item from sequence of params:
 					let params = params.map(|p| p.get().to_string());
 					let rpc_params = jsonrpsee::types::Params::new(params.as_deref());
-					let key: sp_core::Bytes = rpc_params.sequence().next().unwrap();
+					let key: pezsp_core::Bytes = rpc_params.sequence().next().unwrap();
 					let key = std::str::from_utf8(&key.0).unwrap();
 					// Fetch the response to use from our map, popping it from the front.
 					let values = values.get_mut(key).unwrap();

vendor/pezkuwi-subxt/subxt/src/tx/tx_client.rs

@@ -864,7 +864,7 @@ mod test {
 
 	#[test]
 	fn transaction_validity_decoding_is_ok() {
-		use sp_runtime::{
+		use pezsp_runtime::{
 			transaction_validity as sp, transaction_validity::TransactionValidity as T,
 		};