twistlock update to 0.30.0-bb.4

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/twistlock/-/blob/0.30.0-bb.4/CHANGELOG.md

Package MR

big-bang/product/packages/twistlock!352 (merged)

For Issue

Closes issue

Upgrade Notices

N/A

Linked Issue

• Closes issue.
• Same pattern as sso.existingSecret in !351 (merged).

Relevant logs/screenshots

• helm lint and stock helm template pass.
• helm unittest: 5 suites, 38 tests pass, 4 new.
• Defender-only render with existingSecret emits no chart Secret and mounts the named one.
• Defender-only render with neither still fails on the required() guard.