[Modelzoo] Rebuild DIN to update API & enable DeepRec feature.

[Duyi-Wang]

TODO:

• enable following DeepRec feature:
  7) StarServer
  8) Auto Micro Batch same with [Auto Micro Batch] After enable Auto Micro Batch feature in WDL of modelzoo, but get an error. #127
  9) FusedEmbedding API waiting related PR merged.
  10) Smart Stage same with [SmartStaged][Modelzoo] After enable smartstaged feature in WDL of modelzoo, but get an error. #122
  11) Auto Graph Fusion
  12) CPU Memory Optimization:START_STATISTIC_STEP, STOP_STATISTIC_STEP, jemalloc
  14) AdamAsync Optimizer
  15) BF16

  Feature Doc:
  1 ) Embedding Variable
  7) GRPC++
  13) Incremental Checkpoint
  14) AdagradDecay

  （optional, default to closed.)
  2) EmbeddingVariable进阶功能：特征淘汰
  3) EmbeddingVariable进阶功能：特征准入
  4) Dynamic-dimension Embedding Variable There is no feature_column API.
  5) Adaptive Embedding
  6) Multi-Hash Variable[Multi-Hash Variable] An error occurred when Multi-Hash Variable enabled in modelzoo's DIEN. #145
  17) WorkQueue