apps: disable rook network policies by default

[crssnd]

What this PR does / why we need it: rook network policies should be enabled only on env that are using rook-ceph. I propose to disabled them in the default configs.

Checklist:

• [x] Added relevant notes to WIP-CHANGELOG.md
• [x] Proper commit message prefix on all commits
• [ ] Updated the public facing documentation
• Is this changeset backwards compatible for existing clusters? Applying:
  • [x] is completely transparent, will not impact the workload in any way.
  • [ ] requires running a migration script.
  • [ ] will create noticeable cluster degradation. E.g. logs or metrics are not being collected or Kubernetes API server will not be responding while upgrading.
  • [ ] requires draining and/or replacing nodes.
  • [ ] will change any APIs. E.g. removes or changes any CK8S config options or Kubernetes APIs.
  • [ ] will break the cluster. I.e. full cluster migration is required.
• Chart checklist (pick exactly one):
  • [x] I upgraded no Chart.
  • [ ] I upgraded a Chart and determined that no migration steps are needed.
  • [ ] I upgraded a Chart and added migration steps.