Gnocchi publisher has exception in exception handler while updating non existing gnocchi resource

[Michel Nederlof]

The exception raised when trying to update a resource that does not exist yet, raises yet another exception as the key was popped in the try-except statement

Relevant line:
https://opendev.org/openstack/ceilometer/src/branch/master/ceilometer/publisher/gnocchi.py#L608

Will provide a patch for this.

[Michel Nederlof (mnederlof)]

```
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event During handling of the above exception, another exception occurred:
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event Traceback (most recent call last):
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/pipeline/event.py", line 57, in process_notifications
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event p(event)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/pipeline/base.py", line 53, in p
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event p.publish_data(data)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/pipeline/event.py", line 114, in publish_data
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event self.sink.publish_events(supported)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/pipeline/event.py", line 90, in publish_events
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event p.publish_events(events)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/publisher/gnocchi.py", line 527, in publish_events
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event self._update_event(rd, event)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/publisher/gnocchi.py", line 542, in _update_event
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event self._set_update_attributes(resource)
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event File "/var/lib/kolla/venv/lib/python3.10/site-packages/ceilometer/publisher/gnocchi.py", line 593, in _set_update_attributes
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event "ignore it.", resource['id'])
2024-04-29 13:42:28.650 19 ERROR ceilometer.pipeline.event KeyError: 'id'
```