python3Packages.llama-index-readers-llama-parse: fix build by setting hatchling as build-system

pkgs/development/python-modules/llama-index-readers-llama-parse/default.nix

···
   fetchPypi,
   llama-index-core,
   llama-parse,
-  poetry-core,
+  hatchling,
   pythonOlder,
 }:
 
···
 
   pythonRelaxDeps = [ "llama-parse" ];
 
-  nativeBuildInputs = [
-    poetry-core
-  ];
+  build-system = [ hatchling ];
 
   propagatedBuildInputs = [
     llama-parse