Feature request

Feature description

Quoting #494 (comment) on ros2component.api.get_containers_component_info() API:

The problem is that with the current API all waits happen sequentially. E.g. if the service of N nodes isn't available the CLI will hang for N * timeout. I would prefer that the CLI only blocks for timeout seconds (whatever that value is). But that is pretty much our of scope for this PR.