Add support for glance-download import method

Registered by Pranali Deore

Add client support for newly added glance-download import method to support downloading image from another glance/region.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Pranali Deore
Direction:
Needs approval
Assignee:
Pranali Deore
Definition:
New
Series goal:
None
Implementation:
Unknown
Milestone target:
None

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