Remove app collections from circleci configuration

[erkanerol]

We remove kyverno-policy-operator from vsphere, cloud-director and capz collections. We consume it from security-bundle for MCs too.

See:

• https://github.com/giantswarm/vsphere-app-collection/pull/74/files
• https://github.com/giantswarm/capz-app-collection/pull/75/files
• https://github.com/giantswarm/cloud-director-app-collection/pull/75/files

Checklist

• [ ] Update changelog in CHANGELOG.md.
• [ ] Make sure values.yaml and values.schema.json are valid.