Merge pull request !27152 from chenzhuo/grad

Merge pull request !26187 from 杨林枫/csr_frontend

Merge pull request !26034 from zhang_sss/grad

Merge pull request !25918 from chenzhuo/jvp

- Allow the J CNode used multiple as non-call input.
- Check recursive J FG including FV J CNode.
- Add grad functional api.

From: @wangshuide2020
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @yanglf1121
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

add isnan cpu

fix multi_dot

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: @liangchenghui
Signed-off-by:

From: @liangzhibo
Reviewed-by: @ginfung,@zh_qh
Signed-off-by: @zh_qh

From: @yuan_shen_zhou
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui