python3-pbr: update 6.1.0 -> 7.0.1

python3-pbr: update 6.1.0 -> 7.0.1

Drop 0001-change-shebang-to-python3.patch
(the change is made only to tests which aren't installed,
and probably isn't necessary to begin with as upstream
would've fixed it already).

Merge .inc into .bb.

Switch away from setuptools3 as pyproject.toml now exists.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>