pkg_resources is deprecated hence colcon-cmake fails to build with the latest setuptools

[stratakis]

By testing the latest setuptools version on Fedora (67.5.1) colcon-cmake fails to build due to the pkg_resources deprecation.

==================================== ERRORS ====================================
______________ ERROR collecting test/test_parse_cmake_version.py _______________
test/test_parse_cmake_version.py:4: in <module>
    from colcon_cmake.task.cmake import _parse_cmake_version_string
colcon_cmake/task/cmake/__init__.py:12: in <module>
    from pkg_resources import parse_version
/usr/lib/python3.11/site-packages/pkg_resources/__init__.py:121: in <module>
    warnings.warn("pkg_resources is deprecated as an API", DeprecationWarning)
E   DeprecationWarning: pkg_resources is deprecated as an API
=========================== short test summary info ============================
ERROR test/test_parse_cmake_version.py - DeprecationWarning: pkg_resources is...
!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!
=============================== 1 error in 0.13s ===============================