Add pyflakes to CI and fix associated errors:
- add
pyflakes
; - move the
format-python3
job to a separate step; - run
pyflakes
in CI during theformat-python3
job; - remove unused imports in Python3 executor code;
- fix huge problems with
set_zmap_value
which were uncovered bypyflakes
- add a test for
set_zmap_value
Bug: T306365
Edited by Cory Massaro