Adds podman system prune for v2.
Refactoring for code reuse from pods containers images and volume prune.
Adds and enables testcases to support the added feature.
Signed-off-by: Sujil02 <sushah@redhat.com>
* Combine cobra.Command helper functions into validate package
from registry and common packages
* Introduce ChoiceValue for flags
Signed-off-by: Jhon Honce <jhonce@redhat.com>
Sujil02
Jhon Honce
Brent Baude