Automatic merge from submit-queue

This PR adds a new environmental variable ENABLE_CRI for customizing CRI

**What this PR does / why we need it**:

This PR adds a new environmental variable `ENABLE_CRI` for customizing CRI (e.g. switching between dockershim and dockertools) and sets `--enable-cri=true` by default.

**Which issue this PR fixes** 

Fixes #42315.

**Release note**:

```release-note
NONE
```

Maybe we should also cherry-pick this to 1.6 branch.

cc @yujuhong @Random-Liu