[FIX] fixed some compiler warnings in TraceFitters and FF
[INTERNAL] IWYU on openswathalgo
[INTERNAL] IWYU on Feature and ClassTest
[INTERNAL] IWYU cleanup on FeatureMap
[INTERNAL] IWYU on ConsensusFeature and ConsensusMap and additional cleanup on KERNEL classes

Conflicts:
	src/openms/include/OpenMS/FORMAT/ConsensusXMLFile.h
[INTERNAL] IWYU on FeatureHandle
[INTERNAL] IWYU on DATASTRUCTURES