velero update to 6.4.0-bb.0

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/velero/-/blob/6.4.0-bb.0/CHANGELOG.md

Package MR

big-bang/product/packages/velero!145 (merged)

For Issue

Closes big-bang/product/packages/velero#94 (closed)

Upgrade Notices

Update helm chart version to 6.4.0 and kubectl version to 1.29.5.