lint/lint_diff: test_ruff: add pyosmocom
Ruff is very fast and detects some additional things that pylint (which
is already used with pyosmocom) does not.
Depends: pyosmocom I2ca3135f1ce38dcc06dc95c38f4b6258a60121cd
Change-Id: I2fdb36c79efbd0f0fb4bdce3cd0045bb35d4cf64
