message: nydus-image: use the same compressor as chunk for compression info
  Use the same compressor as chunk to compress blob compression info
  array.
diff: @@ -101,11 +101,8 @@ impl Blob {
  // Write blob metadata to the data blob itself.
  if let Some(writer) = blob_writer {
  let pos = writer.pos()?;
  - let (data, header) = Self::dump_meta_data_raw(
  - pos,
  - &blob_ctx.blob_meta_info,
  - compress::Algorithm::Lz4Block,
  - )?;
  + let (data, header) =
  + Self::dump_meta_data_raw(pos, &blob_ctx.blob_meta_info, ctx.compressor)?;
  writer.write_all(&data)?;
  writer.write_all(header.as_bytes())?;
  