Automatic merge from submit-queue

Add configuration for swift container name

**What this PR does / why we need it:**
This review updates the OpenStack Heat provider to allow for configuring the name of the Swift object store.

**Which issue this PR fixes:**
fixes #47966

**Special notes for your reviewer**:
Note that the terminology for OpenStack Swift conflicts with K8S terminology. In this instance, container is referring to the organization structure of Swift storage objects.

**Release note**:
```release-note
Adds configuration option for Swift object store container name to OpenStack Heat provider.
```