EventShapes: cmake cleanup, enable flake8

cmake cleanup of Reconstruction/EventShapes packages. Also enable flake8 where relevant.

unmarked as a Work In Progress

This merge request affects 6 files:

• Reconstruction/EventShapes/EventShapeAthenaPool/CMakeLists.txt
• Reconstruction/EventShapes/EventShapeEvent/CMakeLists.txt
• Reconstruction/EventShapes/EventShapeInterface/CMakeLists.txt
• Reconstruction/EventShapes/EventShapeTPCnv/CMakeLists.txt
• Reconstruction/EventShapes/EventShapeTools/CMakeLists.txt
• Reconstruction/EventShapes/EventShapeTools/python/EventDensityConfig.py

Adding @goetz as watcher

added JetEtmiss Reconstruction master review-pending-level-1 labels

CI Result SUCCESS (hash d21fb025)

	Athena	AthSimulation	AthGeneration	AnalysisBase
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
AnalysisBase: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 22799]

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit d0c5cb10

added sweep:ignore label