Rename cloud.resource_id to cloud.resource.id (blocked - we don't allow such renames for now)

[lmolkova]

There could be cloud.resoure.name and possibly other properties of a cloud resource.

Based on the discussion in#1118, specifically #1118 (comment), we should use . instead of _ where it makes sense.

Since it's easy to imagine cloud.resource.name (e.g. on Azure id would be /subscriptions/<SUBSCIPTION_GUID>/resourceGroups/<RG>/providers/Microsoft.Web/sites/<webapp> and name would be webapp, there could be others - type =Microsoft.Web/sites, group = <RG>)

This could be done during #1118 phase-3 and cannot be done before or after that.