Fix microversion 2.98 doc/tests for update/rebuild APIs

microversion 2.98 changed the GET and GET list details
API response to expand the image field
- https://review.opendev.org/c/openstack/nova/+/939649

but when we change the views/servers.py then update server
and rebuild server API response also gets updated.
- https://review.opendev.org/c/openstack/nova/+/939649/12/nova/api/openstack/compute/views/servers.py#595

The microversion change actually changed the response for
the update and rebuild API but did not update the documentation
about this change. Neither added test for rebuild and update
which verify the response change.

Since microversion 2.75, we have made all these 4 APIs response
consistent.

Implements: blueprint image-properties-in-server-show

Change-Id: Ifc2edc59c601391a31fd8953c742969e5b368767

api-ref/source/servers.inc

@@ -959,6 +959,11 @@ Response
   - host_status: host_status_update_rebuild
   - key_name: key_name_resp_update
 
+**Example Update Server Details (2.98)**
+
+.. literalinclude:: ../../doc/api_samples/servers/v2.98/server-update-resp.json
+   :language: javascript
+
 **Example Update Server Details (2.96)**
 
 .. literalinclude:: ../../doc/api_samples/servers/v2.96/server-update-resp.json