Update gatekeeper to v3.13.0, gluon to 0.4.1, kubectl to 1.27.6

This MR contains the following updates:

Package	Update	Change
gluon	patch	0.4.0 -> 0.4.1
ironbank/opensource/openpolicyagent/gatekeeper	minor	v3.12.0 -> v3.13.0
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl	patch	1.27.3 -> 1.27.6
registry1.dso.mil/ironbank/opensource/openpolicyagent/gatekeeper	minor	v3.12.0 -> v3.13.0

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