ZDC: cmake cleanup

• remove atlas_depends_on_subdirs
• update library and external dependencies
• enable flake8 where relevant

This merge request affects 11 packages:

• ForwardDetectors/ZDC/ZDC_GeoM
• ForwardDetectors/ZDC/ZDC_SD
• ForwardDetectors/ZDC/ZDC_SimEvent
• ForwardDetectors/ZDC/ZDC_SimuDigitization
• ForwardDetectors/ZDC/ZdcAnalysis
• ForwardDetectors/ZDC/ZdcCnv/ZdcByteStream
• ForwardDetectors/ZDC/ZdcCnv/ZdcEventTPCnv
• ForwardDetectors/ZDC/ZdcConditions
• ForwardDetectors/ZDC/ZdcEvent
• ForwardDetectors/ZDC/ZdcIdentifier
• ForwardDetectors/ZDC/ZdcRec

Adding @jchapman as watcher

added Digitization ForwardDetectors Simulation master review-pending-level-1 labels

CI Result SUCCESS (hash 267f6432)

	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 21868]

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

merged

mentioned in commit af7ba330

added sweep:ignore label