python3-pluggy: upgrade 1.5.0 -> 1.6.0

python3-pluggy: upgrade 1.5.0 -> 1.6.0

Comparing changes since 1.5.0:
https://github.com/pytest-dev/pluggy/compare/1.5.0...1.6.0

Release notes:
https://pluggy.readthedocs.io/en/latest/changelog.html#pluggy-1-6-0-2025-05-15

Deprecations and Removals
* Python 3.8 is no longer supported. (#556)

Bug Fixes
* Fix a regression in pluggy 1.1.0 where using result.get_result() on the
  same failed Result causes the exception’s traceback to get longer and
  longer.(#504)
* Correctly pass StopIteration through hook wrappers.(#544)
* Raising a StopIteration in a generator triggers a RuntimeError.
* If the RuntimeError of a generator has the passed in StopIteration as
  cause resume with that StopIteration as normal exception instead of failing
  with the RuntimeError.

Signed-off-by: Tim Orling <tim.orling@konsulko.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>