attach2task should not change anything about the wrapped / shallow-refed / shared p inside

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

a simple example about change the common-shared p inside a task from children.


### 2. What did you expect to see? (Required)
attach2Task should NOT change anything about wrapped/shallowed/shared p inside.

### 3. What did you see instead (Required)
for volcano model, since each logical op only have exact one logical op parent, for this logical op's all enumeration of physical plans, we enumerate them according the possible props listed, but sometimes it is still possible to happen what mentions above.

### 4. What is your TiDB version? (Required)

master