Add support for New File Version Chunked Upload

[unofficialbox]

Is your feature request related to a problem? Please describe.

Current the SDK supports uploading new file versions and chunked uploads independently

Describe the solution you'd like

Describe alternatives you've considered

Manually construct the the upload session. This adds roughly 40-50 lines of extra code

Additional context

public static FileFull uploadLargeFileVersion(BoxClient client, Path filePath, String fileId)
      throws IOException {
    long fileSize = Files.size(filePath);
    String fileName = filePath.getFileName().toString();
    ChunkedUploadsManager chunkedUploads = client.getChunkedUploads();
    System.out.printf("Uploading %s (%,d bytes) as a new version of %s...%n", fileName, fileSize, fileId);

    UploadSession session =
        chunkedUploads.createFileUploadSessionForExistingFile(
            fileId,
            new CreateFileUploadSessionForExistingFileRequestBody.Builder(fileSize)
                .fileName(fileName)
                .build());
    String uploadPartUrl = session.getSessionEndpoints().getUploadPart();
    Hash fileHash = new Hash(HashName.SHA1);

    try (InputStream stream = Files.newInputStream(filePath)) {
      Iterator<InputStream> chunks = iterateChunks(stream, session.getPartSize(), fileSize);
      PartAccumulator uploaded =
          reduceIterator(
              chunks,
              chunkedUploads::reducer,
              new PartAccumulator(-1, Collections.emptyList(), fileSize, uploadPartUrl, fileHash));

      long registered =
          chunkedUploads
              .getFileUploadSessionPartsByUrl(session.getSessionEndpoints().getListParts())
              .getTotalCount();
      if (registered != session.getTotalParts()) {
        throw new IllegalStateException(
            String.format(
                "Box registered %d of %d parts; refusing to commit.",
                registered, session.getTotalParts()));
      }

      return chunkedUploads
          .createFileUploadSessionCommitByUrl(
              session.getSessionEndpoints().getCommit(),
              new CreateFileUploadSessionCommitByUrlRequestBody(uploaded.getParts()),
              new CreateFileUploadSessionCommitByUrlHeaders("sha=" + fileHash.digestHash("base64")))
          .getEntries()
          .get(0);
    }
  }