Fix Python 3.12 build issues in thrift Python

[greggdonovan]

Summary:

• Switch Python setup scripts to use setuptools instead of stdlib distutils (Python 3.12 removed distutils).
• Use setuptools._distutils errors for build_ext error handling when available.
• Guard ntohll/htonll definitions in lib/py/src/ext/endian.h to avoid macOS macro collisions that break C++ builds.

Why:

• Python 3.12 no longer ships distutils, causing thrift builds from sdist to fail during wheel build.
• On macOS, system headers define ntohll/htonll macros; the local inline definitions collided, causing compilation failures.

Validation:

• Built a wheel from lib/py with Python 3.12 successfully after the changes.

[fishy]

should we keep this (but remove Command, looks like that's unused) as fallback for earlier versions of python? (although I'm not familiar of what scenario will have no setuptools but distutils)

[fishy]

same question here regarding fallback to earlier versions of python

[fishy]

also here we are still using distutils?