apacheGH-43532: [Python] Remove usage of deprecated pkg_resources in …

…setup.py (apache#43602)

### Rationale for this change
Closes apache#43532.

### What changes are included in this PR?
Remove deprecated `pkg_resources.resource_filename('numpy', 'core/include')`, replace with `numpy.get_include()`

### Are these changes tested?
Test by CI.

### Are there any user-facing changes?
No

* GitHub Issue: apache#43532

Authored-by: Tai Le Manh <manhtai.lmt@gmail.com>
Signed-off-by: Antoine Pitrou <antoine@python.org>

python/setup.py

@@ -32,7 +32,6 @@
     # Get correct EXT_SUFFIX on Windows (https://bugs.python.org/issue39825)
     from distutils import sysconfig
 
-import pkg_resources
 from setuptools import setup, Extension, Distribution, find_namespace_packages
 
 from Cython.Distutils import build_ext as _build_ext
@@ -106,7 +105,8 @@ class build_ext(_build_ext):
     _found_names = ()
 
     def build_extensions(self):
-        numpy_incl = pkg_resources.resource_filename('numpy', 'core/include')
+        import numpy
+        numpy_incl = numpy.get_include()
 
         self.extensions = [ext for ext in self.extensions
                            if ext.name != '__dummy__']