Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
Add performance test phase timing export.
**What this PR does / why we need it**:
First step totwards allowing us to get a quick overview of test length
via perf-dash.k8s.io.
**Release note**:
```release-note
NONE
```
@kubernetes/sig-scalability-feature-requests
