Update Ironbank to v1.19.3

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/istio/operator	patch	1.19.0 -> 1.19.3
ironbank/tetrate/istio/operator	patch	1.19.0 -> 1.19.3
ironbank/tetrate/istio/operator	minor	1.18.2-tetratefips-v0 -> 1.19.3-tetratefips-v0
registry1.dso.mil/ironbank/opensource/istio/operator	patch	1.19.0 -> 1.19.3
registry1.dso.mil/ironbank/tetrate/istio/operator	minor	1.18.2-tetratefips-v0 -> 1.19.3-tetratefips-v0

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