TrigL1CaloUpgrade: cmake cleanup, enable flake8

cmake cleanup, enable flake8. Also move two non-python module files from python/ to share/.

This merge request affects 1 package:

• Trigger/TrigL1Upgrade/TrigL1CaloUpgrade

Adding @kwhalen as watcher

added Trigger master review-pending-level-1 labels

CI Result SUCCESS (hash 585a4f0d)

	Athena	AthSimulation	AthGeneration
externals
cmake
make
required tests
optional tests

Full details available on this CI monitor view
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 17745]

merged

mentioned in commit 991a0c18

added sweep:ignore label