[LMS-1924] use DataStore.hostUrl

...msx/cisd/openbis/dss/client/api/v1/impl/DssComponent.java

...s/dss/generic/shared/api/v1/DataStoreApiUrlUtilities.java

...t/web/client/application/detailviewers/ImageUrlUtils.java

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

...bis/plugin/screening/server/logic/PlateDatasetLoader.java

...openbis/plugin/screening/server/logic/ScreeningUtils.java

...in/screening/shared/basic/dto/DatasetImagesReference.java

...s/plugin/screening/shared/basic/dto/DatasetReference.java