docs

* feat(498): Add ownerReferences to managed entities
* empty owner reference for cross namespace secret and more tests
* update ownerReferences of existing resources
* removing ownerReference requires Update API call
* CR ownerReference on PVC blocks pvc retention policy of statefulset
* make ownerreferences optional and disabled by default
* update unit test to check len ownerReferences
* update codegen
* add owner references e2e test
* update unit test
* add block_owner_deletion field to test owner reference
* fix typos and update docs once more
* reflect code feedback

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Co-authored-by: Max Begenau <max@begenau.com>