AthenaPoolExampleConverter+AFP_ByteStream2RawCnv: cmake fixes

Don't build the same sources into more than one library.

This merge request affects 2 packages:

• Database/AthenaPOOL/AthenaPoolExample/AthenaPoolExampleConverter
• ForwardDetectors/AFP/AFP_ByteStream2RawCnv

Adding @ggach ,@ssnyder ,@mnowak as watchers

added Database ForwardDetectors master review-pending-level-1 labels

CI Result SUCCESS (hash 98c22b15)

	Athena	AthSimulation	AnalysisBase	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
AnalysisBase: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 13342]

merged

mentioned in commit b5c99d19

added sweep:ignore label