Implement FindThirdPartyOpenGL with the cmake official module.
This fixes issue #218 (only tested on fedora but I'm confident as it mostly uses the cmake module to find OpenGL).
GitLab upgrade completed. Current version is 18.7.4
https://about.gitlab.com/releases/2025/12/18/gitlab-18-7-released/
This fixes issue #218 (only tested on fedora but I'm confident as it mostly uses the cmake module to find OpenGL).