chore(py314): Replace deprecated pkgutil.find_loader (#1888)

This PR removes [pkgutil.find_loader()][] and replaces it with
[importlib.util.find_spec()][]. `find_loader` was deprecated in Python
3.12 and will be removed in 3.14. `find_spec` has been present since
Python 3.4.

Both functions return `None` if the module loader cannot be found. For
its use in this project, this is sufficient and no translation of the
return value is needed.

[pkgutil.find_loader()]:
https://docs.python.org/3/library/pkgutil.html#pkgutil.get_loader
[importlib.util.find_spec()]:
https://docs.python.org/3/library/importlib.html#importlib.util.find_spec

python/pyfury/util.py

@@ -17,7 +17,6 @@
 
 import importlib
 import inspect
-import pkgutil
 import sys
 from typing import Dict, Callable
 
@@ -61,7 +60,7 @@ def add_load_handler(self, func: Callable):
             self._on_loads.append(func)
             return func
 
-    if pkgutil.find_loader(prefix_name) is not None:
+    if importlib.util.find_spec(prefix_name) is not None:
         return LazyModule()
     elif placeholder:
         return ModulePlaceholder(prefix_name)