Update Ironbank

This MR contains the following updates:

Package	Update	Change
registry1.dso.mil/ironbank/kiwigrid/k8s-sidecar (source)	minor	1.26.1 -> 1.27.1
registry1.dso.mil/ironbank/opensource/kubernetes/kubectl (source)	patch	v1.29.3 -> v1.29.5
registry1.dso.mil/ironbank/opensource/memcached/memcached (source)	patch	1.6.23 -> 1.6.27
registry1.dso.mil/ironbank/opensource/nginx/nginx (source)	minor	1.25.4 -> 1.26.0
rollout-operator (source)	minor	0.13.0 -> 0.15.0
grafana-agent-operator (source)	patch	0.3.21 -> 0.3.22

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