Inspect network info of a joined network namespace

[idleroamer]

• Display network info of a joined network namespace upon inspect
  Join network namespace and query interfaces/IPs/gateway
• Due to discrepancy between libpod API and Docker API secondaryIPAddresses are
  left out intentionally but included in main branch PR Inspect network info of a joined network namespace #13366

Signed-off-by: Mostafa Emami [email protected]

[openshift-ci]

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[Luap99]

This is a feature and we do not backport features, this should go into the main branch and it will land in the next minor release.