Add new ecs fields in kubernetes integration

[MichaelKatsoulis]

After the release of new container ECS fields(elastic/beats#22179) and the merge of elastic/beats#30181, we need to new ecs fields in kubernetes integration. The new fields must be added in container and pod data streams.

[botelastic]

Hi! We just realized that we haven't looked into this issue in a while. We're sorry! We're labeling this issue as Stale to make it hit our filters and make sure we get back to it as soon as possible. In the meantime, it'd be extremely helpful if you could take a look at it as well and confirm its relevance. A simple comment with a nice emoji will be enough :+1. Thank you for your contribution!