[add_cloud_metadata] For the AWS cloud provider orchestrator.cluster shouldn't be stored under the cloud.* object

[tetianakravchenko]

In this PR #35182 were introduced new fields fir AWS cloud provider: orchestrator.cluster.name and orchestrator.cluster.id

But those fieds are available under the cloud object, which is not correct because those fields are needed or the kubernetes environment and we rely on them for k8s dashboards - https://github.com/elastic/beats/blob/main/metricbeat/module/kubernetes/_meta/docs.asciidoc#dashboard
and it does not align with the ecs schema - https://www.elastic.co/guide/en/ecs/current/ecs-orchestrator.html#field-orchestrator-cluster-id and https://www.elastic.co/guide/en/ecs/current/ecs-orchestrator.html#field-orchestrator-cluster-name