For plugins that may share resources or resource pools across networks, we should make it explicitly clear that GC must only clean up resources known to be owned by the calling network.
coverage: 63.69%. remained the same
when pulling 2c926b5f17c5a876d38fd094a9e97ffb1175a891 on squeed:gc-shared-warning
into ed014fe9dc27d4a0f8adadb73860e97aa182b9f0 on containernetworking:main.
For plugins that may share resources or resource pools across networks, we should make it explicitly clear that GC must only clean up resources known to be owned by the calling network.