Update Ironbank Docker tags

This MR contains the following updates:

Package	Update	Change
ironbank/opensource/velero/velero	minor	v1.7.1 -> v1.8.0
registry1.dso.mil/ironbank/opensource/velero/velero	minor	v1.7.1 -> v1.8.0
registry1.dso.mil/ironbank/opensource/velero/velero	minor	1.7.1 -> v1.8.0
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-aws	minor	v1.3.0 -> v1.4.0
registry1.dso.mil/ironbank/opensource/velero/velero-plugin-for-microsoft-azure	minor	v1.3.1 -> v1.4.0
velero/velero-restic-restore-helper	minor	v1.7.1 -> v1.8.0

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