Add missing runtime API to schema (#1841)

* Add missing runtime API

* Fix return type

Author: HenriqueNogara

polymesh_schema.json

@@ -1249,6 +1249,26 @@
               }
             ],
             "type": "Vec<DispatchError>"
+          },
+          "instruction_asset_count": {
+            "description": "Returns the AssetCount for the given instruction.",
+            "params": [
+              {
+                "name": "instruction_id",
+                "type": "InstructionId"
+              }
+            ],
+            "type": "AssetCount"
+          },
+          "lock_instruction_weight": {
+            "description": "Returns the weight for executing lock_instruction.",
+            "params": [
+              {
+                "name": "instruction_id",
+                "type": "InstructionId"
+              }
+            ],
+            "type": "Result<Weight, DispatchError>"
           }
         },
         "version": 2