v0.19.0

Vendor in containers/storage v1.23.0
Fix duplicated code found by codeverity.
Export NormalizeCapabilities function
Use homedir.GetConfigHome()
Respect XDG_CONFIG_HOME for policy.json and cni
Fix documentation
hooks_dir_path was in wrong location, should be under Enigine section
Fix deprecation warnings about libpod.conf and raise log level