Changes to Create Inbox Checkout Link

added the new azure enum value to the allOf[subschema #2]/data/domains/items/provider response property for the response status 200

the request property mailboxes became optional

added the new azure enum value to the request property domains/items/provider

added the optional property allOf[subschema #2]/data/azure_domains to the response with the 200 status

added the optional property allOf[subschema #2]/data/domains/items/id to the response with the 200 status

added the optional property allOf[subschema #2]/data/domains/items/nameserver_change_required to the response with the 200 status

added the optional property allOf[subschema #2]/data/domains/items/owned to the response with the 200 status

endpoint added