Summary

Allow for filtering by API Group when retrieving resources using the argocd app get-resource command

Motivation

Currently, there is no ability to specify the API group when retrieving resources sing the argocd app get-resource command. Given that the same resource name can be found in multiple API groups, it is currently not possible to limit the types of responses being returned

Proposal

Introduce a new flag (--group) within the argocd app get-resource command to optionally filter by API group