fix: Complete snowbridge pezpallet rebrand and critical bug fixes

- snowbridge-pezpallet-* → pezsnowbridge-pezpallet-* (201 refs)
- pallet/ directories → pezpallet/ (4 locations)
- Fixed pezpallet.rs self-include recursion bug
- Fixed sc-chain-spec hardcoded crate name in derive macro
- Reverted .pezpallet_by_name() to .pallet_by_name() (subxt API)
- Added BizinikiwiConfig type alias for zombienet tests
- Deleted obsolete session state files

Verified: pezsnowbridge-pezpallet-*, pezpallet-staking,
pezpallet-staking-async, pezframe-benchmarking-cli all pass cargo check

bizinikiwi/pezframe/meta-tx/src/benchmarking.rs

@@ -73,7 +73,7 @@ pub mod types {
 }
 
 fn assert_last_event<T: Config>(generic_event: <T as Config>::RuntimeEvent) {
-	pezframe_system::Pallet::<T>::assert_last_event(generic_event.into());
+	pezframe_system::Pezpallet::<T>::assert_last_event(generic_event.into());
 }
 
 #[benchmarks(
@@ -123,7 +123,7 @@ mod benchmarks {
 	}
 
 	impl_benchmark_test_suite! {
-		Pallet,
+		Pezpallet,
 		crate::mock::new_test_ext(),
 		crate::mock::Runtime,
 	}