apply nncp to configure interface level DNS on ipv6 single-stack cluster, file /etc/resolv.conf is not updated

OCP version: 4.16.0-0.nightly-2024-03-13-061822
kubernetes-nmstate-operator.4.16.0-202403111814

always

1. install knmstate operator
2. apply below nncp to configure dns on one of the node
---
apiVersion: nmstate.io/v1
kind: NodeNetworkConfigurationPolicy
metadata:
  name: dns-static-int2
spec:
  nodeSelector:
    kubernetes.io/hostname: worker-2.sriov.openshift-qe.sdn.com
  desiredState:
    dns-resolver:
      config:
        search:
        - testint.com
        server:
        - fd2e:6f44:5dd8:c956::19
        - 2088::9999
    interfaces:
    - ipv6:
        address:
        - ip: 2006:db8::1:66
          prefix-length: 64
        auto-dns: false
        dhcp: false
        enabled: true
      name: dummy6
      state: up
      type: dummy
# oc apply -f dns-int.yaml 
nodenetworkconfigurationpolicy.nmstate.io/dns-static-int2 created
# oc get nncp
NAME              STATUS      REASON
dns-static-int2   Available   SuccessfullyConfigured
# oc get nnce
NAME                                                  STATUS      STATUS AGE   REASON
worker-2.sriov.openshift-qe.sdn.com.dns-static-int2   Available   4s           SuccessfullyConfigured

file /etc/resolv.conf is not updated:

sh-5.1# cat /etc/resolv.conf 
# Generated by KNI resolv prepender NM dispatcher script
search sriov.openshift-qe.sdn.com
nameserver fd2e:6f44:5dd8:c956::19
nameserver fd2e:6f44:5dd8:c956::1
nameserver fe80::5054:ff:fe60:a44d%br-ex
sh-5.1#

/var/run/NetworkManager/resolv.conf is updated correctly:
sh-5.1# cat /var/run/NetworkManager/resolv.conf 
# Generated by NetworkManager
search testint.com sriov.openshift-qe.sdn.com
nameserver fd2e:6f44:5dd8:c956::19
nameserver 2088::9999
nameserver fd2e:6f44:5dd8:c956::1
# NOTE: the libc resolver may not support more than 3 nameservers.
# The nameservers listed below may not be recognized.
nameserver fe80::5054:ff:fe60:a44d%br-ex
sh-5.1#
sh-5.1# nmcli | grep 'DNS config' -A 10
DNS configuration:
	servers: fd2e:6f44:5dd8:c956::19 2088::9999
	domains: testint.com
	interface: dummy6
... ...

the file /etc/resolv.conf can be updated accordingly