Feat: enable owner references (#2688)

* 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

---------

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

pkg/apis/acid.zalan.do/v1/crds.go

@@ -1326,7 +1326,7 @@ var OperatorConfigCRDResourceValidation = apiextv1.CustomResourceValidation{
 							"enable_init_containers": {
 								Type: "boolean",
 							},
-							"enable_secrets_deletion": {
+							"enable_owner_references": {
 								Type: "boolean",
 							},
 							"enable_persistent_volume_claim_deletion": {
@@ -1341,6 +1341,9 @@ var OperatorConfigCRDResourceValidation = apiextv1.CustomResourceValidation{
 							"enable_readiness_probe": {
 								Type: "boolean",
 							},
+							"enable_secrets_deletion": {
+								Type: "boolean",
+							},
 							"enable_sidecars": {
 								Type: "boolean",
 							},

pkg/apis/acid.zalan.do/v1/operator_configuration_type.go

@@ -55,6 +55,7 @@ type MajorVersionUpgradeConfiguration struct {
 
 // KubernetesMetaConfiguration defines k8s conf required for all Postgres clusters and the operator itself
 type KubernetesMetaConfiguration struct {
+	EnableOwnerReferences *bool  `json:"enable_owner_references,omitempty"`
 	PodServiceAccountName string `json:"pod_service_account_name,omitempty"`
 	// TODO: change it to the proper json
 	PodServiceAccountDefinition            string                       `json:"pod_service_account_definition,omitempty"`

pkg/apis/acid.zalan.do/v1/zz_generated.deepcopy.go

@@ -158,6 +158,11 @@ func (in *ConnectionPoolerConfiguration) DeepCopy() *ConnectionPoolerConfigurati
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *KubernetesMetaConfiguration) DeepCopyInto(out *KubernetesMetaConfiguration) {
 	*out = *in
+	if in.EnableOwnerReferences != nil {
+		in, out := &in.EnableOwnerReferences, &out.EnableOwnerReferences
+		*out = new(bool)
+		**out = **in
+	}
 	if in.SpiloAllowPrivilegeEscalation != nil {
 		in, out := &in.SpiloAllowPrivilegeEscalation, &out.SpiloAllowPrivilegeEscalation
 		*out = new(bool)