neuvector update to 2.6.3-bb.18

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/neuvector/-/blob/2.6.3-bb.18/CHANGELOG.md

Package MR

big-bang/product/packages/neuvector!103 (merged)

For Issue

Closes big-bang/product/packages/neuvector#99 (closed)

Upgrade Notices

Adding custom network policies at the valueslevel using:

networkPolicies:
 additionalPolicies: []