python3-setuptools: upgrade 70.3.0 -> 71.1.0

python3-setuptools: upgrade 70.3.0 -> 71.1.0

Changelog:
=============
- Added return types to typed public functions
- Marked Package Discovery and Resource Access using pkg_resources as py.typed
- Removed lingering unused code around Distribution._patched_dist.
- Reset the backports module when enabling vendored packages.
- Include all vendored files in the sdist.
- Restored package data that went missing in 71.0. This change also incidentally
  causes tests to be installed once again.

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>