velero update to 6.0.0-bb.3

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/velero/-/blob/6.0.0-bb.3/CHANGELOG.md

Package MR

big-bang/product/packages/velero!131 (merged)

For Issue

Closes big-bang/product/packages/velero#86 (closed)

Upgrade Notices

Adding custom network policies at the valueslevel using:

networkPolicies:
 additionalPolicies: []