Automatic merge from submit-queue (batch tested with PRs 48082, 48815, 48901, 48824)

mountpath should be absolute

**What this PR does / why we need it**:
Should validate the mountpath before mounting to container. Docker forbids mounting to a relative path inside the container. 

**Which issue this PR fixes** : fixes #48749

**Special notes for your reviewer**:

**Release note**:

```release-note
MountPath should be absolute
```