Merge branch '351657-refactor-upload-destinations' into 'master'

workhorse/internal/upload/artifacts_store_test.go

workhorse/internal/upload/artifacts_upload_test.go

workhorse/internal/upload/artifacts_uploader.go

workhorse/internal/upload/body_uploader.go

workhorse/internal/upload/body_uploader_test.go

workhorse/internal/upload/destination/destination.go

workhorse/internal/upload/destination/destination_test.go

workhorse/internal/upload/destination/filestore/filestore.go

...e/internal/upload/destination/filestore/filestore_test.go

workhorse/internal/upload/destination/multi_hash.go

...internal/upload/destination/objectstore/gocloud_object.go

...nal/upload/destination/objectstore/gocloud_object_test.go

...orse/internal/upload/destination/objectstore/multipart.go

...internal/upload/destination/objectstore/multipart_test.go

workhorse/internal/upload/destination/objectstore/object.go

...se/internal/upload/destination/objectstore/object_test.go

...rse/internal/upload/destination/objectstore/prometheus.go

...load/destination/objectstore/s3_complete_multipart_api.go

...orse/internal/upload/destination/objectstore/s3_object.go

...internal/upload/destination/objectstore/s3_object_test.go