Update Ironbank

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/istio/operator	patch	1.19.5 -> 1.19.6
ironbank/tetrate/istio/operator	minor	1.19.5 -> 1.20.2
registry1.dso.mil/ironbank/opensource/istio/operator	patch	1.19.5 -> 1.19.6
registry1.dso.mil/ironbank/tetrate/istio/operator	minor	1.19.5-tetratefips-v0 -> 1.20.2-tetratefips-v0

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