Update Base to v1.16.0 and kubectl to v1.21.12

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/big-bang/base	minor	1.2.0 -> 1.16.0
registry1.dso.mil/ironbank/opensource/kubernetes-1.21/kubectl	patch	v1.21.5 -> v1.21.12

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