message: nydus-image: enable blob meta chunk v2 for directory builder
  Enable blob meta chunk v2 for directory builder.
diff: @@ -26,7 +26,7 @@ use nydus_app::{setup_logging, BuildTimeInfo};
  use nydus_rafs::metadata::RafsVersion;
  use nydus_rafs::RafsIoReader;
  use nydus_storage::factory::BlobFactory;
  -use nydus_storage::meta::format_blob_meta_features;
  +use nydus_storage::meta::{format_blob_meta_features, BLOB_META_FEATURE_CHUNK_INFO_V2};
  use nydus_storage::{RAFS_DEFAULT_CHUNK_SIZE, RAFS_MAX_CHUNK_SIZE};
  use nydus_utils::{compress, digest};
  use serde::{Deserialize, Serialize};
  @@ -710,7 +710,10 @@ impl Command {
  };
  let mut builder: Box<dyn Builder> = match conversion_type {
  - ConversionType::DirectoryToRafs => Box::new(DirectoryBuilder::new()),
  + ConversionType::DirectoryToRafs => {
  + build_ctx.blob_meta_features |= BLOB_META_FEATURE_CHUNK_INFO_V2;
  + Box::new(DirectoryBuilder::new())
  + }
  ConversionType::DirectoryToStargz => unimplemented!(),
  ConversionType::DirectoryToTargz => unimplemented!(),
  ConversionType::EStargzToRafs => Box::new(TarballBuilder::new(conversion_type)),
  