[LMS-1708] Codes and labels for channels

...x/cisd/openbis/dss/etl/AbstractHCSImageFileExtractor.java

.../ch/systemsx/cisd/openbis/dss/etl/AcquiredPlateImage.java

.../ch/systemsx/cisd/openbis/dss/etl/ChannelDescription.java

.../ch/systemsx/cisd/openbis/dss/etl/HCSDatasetUploader.java

...a/ch/systemsx/cisd/openbis/dss/etl/HCSImageCheckList.java

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

.../systemsx/cisd/openbis/dss/etl/HCSImageFileExtractor.java

...systemsx/cisd/openbis/dss/etl/IHCSImageDatasetLoader.java

.../systemsx/cisd/openbis/dss/etl/PlateStorageProcessor.java

.../openbis/dss/etl/ScreeningContainerDatasetInfoHelper.java

...isd/openbis/dss/etl/dataaccess/HCSImageDatasetLoader.java

...x/cisd/openbis/dss/etl/dynamix/HCSImageFileExtractor.java

...nbis/dss/generic/server/MergingImagesDownloadServlet.java

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

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

...web/client/application/detailviewers/ChannelComboBox.java

...ient/application/detailviewers/PlateMaterialReviewer.java

...b/client/application/detailviewers/WellContentDialog.java

...ient/web/client/application/detailviewers/WellImages.java

...gin/screening/shared/api/v1/dto/ImageDatasetMetadata.java