DOC: Deprecate methods that will be removed in OTB 8.0.0

.../Core/Metadata/include/otbDefaultImageMetadataInterface.h

...Core/Metadata/include/otbFormosatImageMetadataInterface.h

...s/Core/Metadata/include/otbIkonosImageMetadataInterface.h

...les/Core/Metadata/include/otbImageMetadataInterfaceBase.h

Modules/Core/Metadata/include/otbNoDataHelper.h

...etadata/include/otbOpticalDefaultImageMetadataInterface.h

.../Core/Metadata/include/otbOpticalImageMetadataInterface.h

...Core/Metadata/include/otbPleiadesImageMetadataInterface.h

...ore/Metadata/include/otbQuickBirdImageMetadataInterface.h

...ore/Metadata/include/otbRadarsat2ImageMetadataInterface.h

...re/Metadata/include/otbSarDefaultImageMetadataInterface.h

...ore/Metadata/include/otbSentinel1ImageMetadataInterface.h

...es/Core/Metadata/include/otbSpot6ImageMetadataInterface.h

...les/Core/Metadata/include/otbSpotImageMetadataInterface.h

...Core/Metadata/include/otbTerraSarImageMetadataInterface.h

...re/Metadata/include/otbWorldView2ImageMetadataInterface.h