Deleting a SMM also deletes the SMMR in OpenShift Service Mesh

Bug description:

Service Mesh operator is deleting a ServiceMeshMemberRoll (smmr) when a ServiceMeshMember (smm) is removed manually. This an unexpected behaviour because there are more ServiceMeshMember objects created.

Bug reproducer:

• Initially there's no SMMR and SMM created, only a SMCP.

#  oc get smcp,smm,smmr -A
NAMESPACE      NAME         READY   STATUS            PROFILES      VERSION   AGE

istio-system   servicemeshcontrolplane.maistra.io/basic   9/9     ComponentsReady   ["default"]   2.3.0     29m

• Creating 2 SMMs (files attached)

#  oc apply -f smm01.yaml 

#  oc apply -f smm02.yaml

NOTE: SMM can not be created with a name different of "default" because the Operator got an error like this

Error from server: error when creating "smmr01.yaml": admission webhook "smm.validation.maistra.io" denied the request: the ServiceMeshMember resource must be named "default"

Source: https://github.com/maistra/istio-operator/blob/maistra-2.3/pkg/controller/servicemesh/webhooks/validation/member.go#L52

// verify name == default
    if common.MemberName != smm.Name
Unknown macro: {         return admission.Errored(http.StatusBadRequest, fmt.Errorf("the ServiceMeshMember resource must be named %q", common.MemberName))     }

• Check the current status in order to verify SMM and SMMR have been created sucessfully:

#  oc get smm,smmr -A
NAMESPACE            NAME                                   CONTROL PLANE        READY   AGE
bookinfo             servicemeshmember.maistra.io/default   istio-system/basic   True    16s
my-awesome-project   servicemeshmember.maistra.io/default   istio-system/basic   True    12s

NAMESPACE      NAME                                       READY   STATUS       AGE
istio-system   servicemeshmemberroll.maistra.io/default   2/2     Configured   16s

• Deleting one of the SMM created previously

#  oc delete smm default -n bookinfo
servicemeshmember.maistra.io "default" deleted

• Verify that SMMR has been deleted, remains the second SMM

#  oc get smm,smmr -A
NAMESPACE            NAME                                   CONTROL PLANE        READY   AGE
my-awesome-project   servicemeshmember.maistra.io/default   istio-system/basic   True    5m10s

Once SMMR is deleted, the dataplane stops working.

Behaviour tested in OSSM 2.1, OSSM 2.2 and OSSM 2.3. As a workaround, it does not happen if the SMMR is created manually before creating SMM