Release v0.22.0

• Bump urllib3 from 1.26.18 to 1.26.19 (#784) (@dependabot)
• Ignore blank likes in host_list file (#761) (@VenkataNaladala94)
• Allow specifying storage classes (#777) (@maburadeh, @adejanovski, @rzvoncek)
• Bump azure-identity from 1.14.0 to 1.16.1 (#776) (@dependabot)
• Adding support to build images for multiple architectures (#760) (@EmanuelSanchez, @adejanovski)
• Make object store read timeout configurable (#763) (@rzvoncek)
• Fix a bug where 'None' got into the path prefix we actually list with (#770) (@rzvoncek)