Add a policy to deprecate the old FindPython modules
A policy to deprecate the old find
modules would be great and I think it's about time. Maybe 3.17, but 3.18 would be OK with me too if it gets involved. We can look to FindOpenGL
for how to implement policy logic in CMake module code. The new ones are working really well and when you mix the new and old, you end up with fun things like the old one finding the Apple-shipped Python and the new one finding HomeBrew's. Nope, totally haven't had this issue cause trouble >.> .