LMS-2045 image-level transformation fixes and improvements

...emsx/cisd/openbis/dss/generic/shared/utils/ImageUtil.java

...sx/cisd/openbis/dss/etl/HCSImageDatasetLoaderFactory.java

...sx/cisd/openbis/dss/etl/ImagingDatabaseVersionHolder.java

...openbis/dss/generic/server/images/ImageChannelsUtils.java

.../openbis/dss/screening/server/DssServiceRpcScreening.java

...h/systemsx/cisd/openbis/dss/shared/DssScreeningUtils.java

...reening/client/api/v1/ExampleImageTransformerFactory.java

...d/openbis/plugin/screening/server/logic/plugin/.gitignore

...g/shared/imaging/dataaccess/IImagingReadonlyQueryDAO.java

...ing/shared/imaging/dataaccess/IImagingTransformerDAO.java

...ugin/screening/shared/imaging/dataaccess/ImgImageDTO.java

...eening/shared/imaging/dataaccess/ImgImageEnrichedDTO.java

screening/source/sql/postgresql/010/schema-010.sql

...ing/source/sql/postgresql/migration/migration-009-010.sql

.../cisd/openbis/dss/etl/dataaccess/ImagingQueryDAOTest.java