[setuptools] Update to 77.0.2

[srittau]

Add setuptools._distutils.compilers.C.unix and setuptools._distutils.unixccompiler

Closes: #13669

[Avasam]

v77 didn't last long ^^"

Wanna bump all the way to 78.1? From what I can see, here's the only public typing related changes:

• setuptools/_distutils/command/install.py's install.config_vars is now a ChainMap
• setuptools/_distutils/compilers/C/msvc.py added back the accidentally removed shared_lib_format property
• warn_dash_deprecation and make_option_lowercase have been removed from setuptools/dist.py

[srittau]

Wanna bump all the way to 78.1?

I can prepare a new PR when this gets merged and stubsabot has done its thing. I find it easier to manage.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉