OZG-4097 send-attachment: Delete attachments on unsuccessful chunk upload

...ichten/postfach/osiv2/transfer/Osi2QuarantineService.java

...chrichten/postfach/osiv2/transfer/Osi2ResponseMapper.java

...ten/postfach/osiv2/transfer/PostfachApiFacadeService.java

...ichten/postfach/osiv2/OsiPostfachRemoteServiceITCase.java

...postfach/osiv2/OsiPostfachRemoteServicePrimaryITCase.java

...stfach/osiv2/OsiPostfachRemoteServiceSecondaryITCase.java

...hten/postfach/osiv2/attachment/ConcatInputStreamTest.java

...ten/postfach/osiv2/attachment/LimitedInputStreamTest.java

...hten/postfach/osiv2/factory/FileChunkInfoTestFactory.java

...ten/postfach/osiv2/factory/Osi2FileUploadTestFactory.java

...stfach/osiv2/factory/QuarantineFileResultTestFactory.java

...hten/postfach/osiv2/transfer/Osi2PostfachServiceTest.java

...en/postfach/osiv2/transfer/Osi2QuarantineServiceTest.java

...ichten/postfach/osiv2/transfer/Osi2RequestMapperTest.java

...chten/postfach/osiv2/transfer/Osi2ResponseMapperTest.java

...postfach/osiv2/transfer/PostfachApiFacadeServiceTest.java