package/python-gobject: bump version to 3.36.0

Other changes:
  - Convert the package to a meson package.
  - Remove 0001-add-PYTHON_INCLUDES-override.patch as it no longer applies.
  - Add gobject-introspection as a dependency.
  - Add the package under myself in the DEVELOPERS file.

Because gobject-introspection is now a dependency of python-gobject, the test
must be updated at the same time.

 - Change TestPythonPy2Gobject to TestPythonPy3Gobject as
   gobject-introspection requires python3.

 - Refactor test_python_gobject.py to no longer inherit the
   TestPythonPackageBase class, as this class uses a base config that does not
   support gobject-introspection.

 - Update sample_python_gobject to use Glib to find the path of sh.

Signed-off-by: Adam Duskett <Aduskett@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

support/testing/tests/package/sample_python_gobject.py

@@ -1 +1,12 @@
-import gobject  # noqa
+#!/usr/bin/env python
+"""A simple test that uses python-gobject to find the path of sh."""
+from gi.repository import GLib
+
+def main():
+    sh_path = GLib.find_program_in_path('sh')
+    if sh_path == "/bin/sh":
+      return True
+    return False
+
+if __name__ == '__main__':
+    main()