improve resource gc performances

[lburgazzoli]

cleaning up old resources may take a little bit of time which increase the deployment time, we should optimize the algorithm we use to collect related resources.

[astefanutti]

One option may be to change the delete operation options to either use a background or orphan propagation policy. If that does not lead to a significant latency improvement, we'll have to change the algorithm to avoid discovering the resource types and use a hard-coded list of supported types.