Merge pull request !26591 from wangnan39/code_docs_modify_optim_and_dataset

This reverts commit b077aa1cab.

Revert "[feat] [assistant] [I3T96X] add new Dataset operator LibriSpeechDataset"

This reverts commit 4e6f7dc97d.

delete pass_registry_test.cc

comment  hiai_nlu_model_multi.pb related  line

fix grad_freeeze bug

acc update

add split point

fix eval getnext failed and fix acc bug.

update acc.

fix acc bug.

From: @linqingke
Reviewed-by: @guoqi1024,@xu-yfei
Signed-off-by: @xu-yfei

add gc.

remove gc in less_bn

[Less BN]Add GC optimizer.

update format.

fix bug.

From: @lijiaqi0612
Reviewed-by: @kisnwang,@kingxian
Signed-off-by: @kingxian

From: @gong_zi_yan
Reviewed-by: @kisnwang,@stsuteng
Signed-off-by: @stsuteng

From: @caozhou_huawei
Reviewed-by: 
Signed-off-by:

From: @lijiaqi0612
Reviewed-by: 
Signed-off-by:

The basic idea is: exploits data dependency to control the execution order
of side-effect operations, and keep the semantics of ANF unchanged.

The ControlDepend primitive is removed and there are two primitives added:

1. UpdateState:
```
  a = Assign(para, value)
```
became:
```
  a = Assign(para, value, u)
  u = UpdateState(u, a)
```

2. Load:
```
  x = Add(para, value)
```
became:
```
  p = Load(para, u)
  x = Add(p, value)
  u = UpdateState(u, p)
```

From: @yanglf1121
Reviewed-by: @kingxian,@zhunaipan
Signed-off-by: @kingxian