Description of problem:

Recently in Rocky, Glance has added ability to configure multiple stores
as a EXPERIMENTAL feature. This feature is on schedule to be fully supported
in Train cycle. This way operator can configure more than one of similar
or different kind of stores and use one as a default store. If store is not
specified at the time of uploading the image then the image will be stored
in default store.

In case of cinder upload-volume-to-image if multiple stores are configured
then the volume image will always be uploaded to default store. This will
not cause any issue unless operator wants to upload volume images to
dedicated stores.