OZG-297 persist uploaded files in own collection

pluto-interface/src/main/protobuf/BinaryFileService.proto

...zg/pluto/common/converter/ZonedDateTimeReadConverter.java

.../de/itvsh/ozg/pluto/files/BinaryFileCustomRepository.java

...e/itvsh/ozg/pluto/files/BinaryFilePersistanceWrapper.java

...n/java/de/itvsh/ozg/pluto/files/BinaryFileRepository.java

...va/de/itvsh/ozg/pluto/files/BinaryFileRepositoryImpl.java

...r/src/main/java/de/itvsh/ozg/pluto/files/FileService.java

.../java/de/itvsh/ozg/pluto/files/GrpcBinaryFileService.java

...c/main/java/de/itvsh/ozg/pluto/files/GrpcFileService.java

...vsh/ozg/pluto/files/GrpcGetOzgFileDataResponseMapper.java

...main/java/de/itvsh/ozg/pluto/files/GrpcOzgFileMapper.java

...erver/src/main/java/de/itvsh/ozg/pluto/files/OzgFile.java

...r/src/main/java/de/itvsh/ozg/pluto/files/OzgFileData.java

...ava/de/itvsh/ozg/pluto/files/UploadedFilesRepository.java

...n/java/de/itvsh/ozg/pluto/vorgang/IncomingFileMapper.java

pluto-server/src/main/resources/application-local.yml

.../pluto/files/BinaryFilePersistanceWrapperTestFactory.java

.../de/itvsh/ozg/pluto/files/BinaryFileRepositoryITCase.java

...er/src/test/java/de/itvsh/ozg/pluto/files/FileITCase.java

...c/test/java/de/itvsh/ozg/pluto/files/FileServiceTest.java