[BUG]: invoke_system_call rpc does not fallback to thunks

[sgerbino]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Calling a system call that is implemented via thunk returns an error.

// CALL
const result = await provider.call("chain.invoke_system_call", {
  name: "get_object",
  args: utils.encodeBase64url(ser),
});

// ERROR
{"error":"system call 303 is implemented via thunk","code":1,"id":303}

Expected behavior

The call should execute a return the expected result.

Steps to reproduce

No response

Environment

- OS:

Anything else?

No response