Automatic merge from submit-queue (batch tested with PRs 46151, 47602, 47507, 46203, 47471)

rebase gophercloud to support HTTP status 300 in pagination, so listingng Cinder v1/v2 API versions won't break

**What this PR does / why we need it**:
Since Cinder block v1/v2 support lands in 1.7, we have to ensure Cinder block api list won't fail due to https://github.com/gophercloud/gophercloud/pull/384.


**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #47651

**Special notes for your reviewer**:

@anguslees @NickrenREN 

**Release note**:

```release-note
NONE
```