Automatic merge from submit-queue (batch tested with PRs 53280, 53330). 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 permisions for Metrics Server to read resources on cluster level

**What this PR does / why we need it**:
Add permisions for Metrics Server to read resources on cluster level.

**Which issue this PR fixes**:
fixes https://github.com/kubernetes-incubator/metrics-server/issues/16

**Release note**:
```release-note
Fix permissions for Metrics Server.
```