Draft: Update Ironbank Docker tags to v1.11.3

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/istio/install-cni	patch	1.11.2 -> 1.11.3
ironbank/opensource/istio/pilot	patch	1.11.2 -> 1.11.3
ironbank/opensource/istio/proxyv2	patch	1.11.2 -> 1.11.3

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