Werk #15879: host_config: introduction of background job for host_rename endpoint

Prior to this werk, the host_rename endpoint occasionally ran into a timeout if the renaming process took too long. This werk introduces a background job to resolve this issue. The endpoint now returns a redirect response instead of the host details. An associating wait-for-completion endpoint is also introduced to accompany the rename endpoint. Scripts should be adjusted accordingly.

Prior to this werk, the rename process was initiated by calling the endpoint: /objects/host_config/host_id/actions/rename/invoke

This endpoint remains the same but the werk introduces the additional endpoint to wait for the process' completion: /domain-types/host_config/actions/actions/wait-for-completion/invoke

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