Fix backwards compatibility for add_private_key (cherrypick from main) (#18256)

Fix backwards compatibility for `add_private_key` (#18237)

* Fix backwards compatibility for `add_private_key`

* Another backwards compatibility fix

Co-authored-by: Matt Hauff <[email protected]>

Author: emlowe

chia/daemon/keychain_server.py

@@ -174,9 +174,9 @@ def get_keychain_for_request(self, request: Dict[str, Any]) -> Keychain:
     async def handle_command(self, command: str, data: Dict[str, Any]) -> Dict[str, Any]:
         try:
             if command == "add_private_key":
-                return await self.add_key(
-                    {"mnemonic_or_pk": data.get("mnemonic", None), "label": data.get("label", None), "private": True}
-                )
+                data["private"] = True
+                data["mnemonic_or_pk"] = data.get("mnemonic_or_pk", data.get("mnemonic", None))
+                return await self.add_key(data)
             elif command == "add_key":
                 return await self.add_key(data)
             elif command == "check_keys":