Automatic merge from submit-queue

Make storage e2e tests start with [sig-storage] instead of [k8s.io].

This makes understanding sig ownership from a test name very easy for
tools and humans.

- Use a SIGDescribe helper function that adds a [sig-storage] prefix instead of [k8s.io] for tests in storage/
- Move a test that should be in storage into storage.
- Make tests owned by multiple SIGs (configmap test) have [sig-storage] instead of [Volume] labels.

This means that all tests that sig-storage directly owns can be found with a simple regex.

/cc @kubernetes/sig-storage-pr-reviews 

**What this PR does / why we need it**:
This will be used to make a testgrid dashboard for sig-storage.

**Release note**:
```release-note
NONE
```

Issue #48779