fix(staking): move nomination-pools from relay chain to Asset Hub

- Relay chain HEZ: only relaychain staking (validator staking)
- Asset Hub HEZ: nomination-pools staking
- Matches actual Pezkuwi runtime configuration where NominationPools pallet is on Asset Hub

chains/v22/chains_dev.json

@@ -43,8 +43,7 @@
         "name": "Hezkurd",
         "priceId": "hezkurd",
         "staking": [
-          "relaychain",
-          "nomination-pools"
+          "relaychain"
         ],
         "type": "native",
         "icon": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/main/icons/tokens/HEZ.png",
@@ -130,7 +129,9 @@
         "precision": 12,
         "name": "Hezkurd",
         "priceId": "hezkurd",
-        "staking": null,
+        "staking": [
+          "nomination-pools"
+        ],
         "type": "native",
         "icon": "https://raw.githubusercontent.com/pezkuwichain/pezkuwi-wallet-utils/main/icons/tokens/HEZ.png",
         "buyProviders": {},