Failures in TestANPNetworkPolicyStatsWithDropAction on dual-stack clusters

[srikartati]

Describe the bug
Failure in TestANPNetworkPolicyStatsWithDropAction on dual-stack cluster bed continuously on two runs.
http://10.176.27.169:8080/job/antrea-ipv6-ds-e2e-for-pull-request/444/consoleFull
http://10.176.27.169:8080/job/antrea-ipv6-ds-e2e-for-pull-request/443/consoleFull

Seems intermittent; last success was on July 1st
http://10.176.27.169:8080/job/antrea-ipv6-ds-e2e-for-pull-request/

To Reproduce
Run the Jenkins test using /test-ipv6-e2e

Expected
The test should pass on dual-stack cluster testbeds.

Actual behavior

=== RUN   TestANPNetworkPolicyStatsWithDropAction
    fixtures.go:146: Creating 'antrea-test' K8s Namespace
    fixtures.go:109: Applying Antrea YAML
    fixtures.go:113: Waiting for all Antrea DaemonSet Pods
    fixtures.go:117: Checking CoreDNS deployment
I0706 19:04:12.998367   22412 k8s_util.go:623] Creating/updating Antrea NetworkPolicy antrea-test/np1
    antreapolicy_test.go:2805: Waiting for ANP 'antrea-test/np1' to be realized
E0706 19:04:18.402715   22412 antreapolicy_test.go:81] error when waiting for ANP 'antrea-test/np1' to be realized: timed out waiting for the condition
I0706 19:04:18.607066   22412 k8s_util.go:808] Deleting test Namespace x
E0706 19:04:18.609924   22412 k8s_util.go:810] Error when deleting Namespace 'x': namespaces "x" not found
I0706 19:04:18.609966   22412 k8s_util.go:808] Deleting test Namespace y
E0706 19:04:18.612024   22412 k8s_util.go:810] Error when deleting Namespace 'y': namespaces "y" not found
I0706 19:04:18.612063   22412 k8s_util.go:808] Deleting test Namespace z
E0706 19:04:18.617708   22412 k8s_util.go:810] Error when deleting Namespace 'z': namespaces "z" not found
    antreapolicy_test.go:83: test failed: error when waiting for ANP 'antrea-test/np1' to be realized: timed out waiting for the condition
    fixtures.go:352: Deleting Pod 'test-client-w8087k9e'
    fixtures.go:352: Deleting Pod 'test-server-rzqlitag'
    fixtures.go:220: Exporting test logs to '/var/lib/jenkins/workspace/antrea-ipv6-ds-e2e-for-pull-request/antrea-test-logs/TestANPNetworkPolicyStatsWithDropAction/beforeTeardown.Jul06-19-04-18'
    fixtures.go:324: Error when exporting kubelet logs: error when running journalctl on Node 'antrea-ipv6-5-0', is it available? Error: <nil>
    fixtures.go:345: Deleting 'antrea-test' K8s Namespace
--- FAIL: TestANPNetworkPolicyStatsWithDropAction (69.92

Antrea controller logs:

I0706 19:04:13.032176       1 antreanetworkpolicy.go:32] Processing Antrea NetworkPolicy antrea-test/np1 ADD event
I0706 19:04:13.040492       1 antreanetworkpolicy.go:47] Processing Antrea NetworkPolicy antrea-test/np1 UPDATE event
E0706 19:04:13.044968       1 status_controller.go:247] Failed to sync NetworkPolicy status a19a355a-58e1-42eb-9137-b45fdca38287: Operation cannot be fulfilled on networkpolicies.crd.antrea.io "np1": the object has been modified; please apply your changes to the latest version and try again
I0706 19:04:13.051487       1 antreanetworkpolicy.go:47] Processing Antrea NetworkPolicy antrea-test/np1 UPDATE event
I0706 19:04:21.046780       1 antreanetworkpolicy.go:47] Processing Antrea NetworkPolicy antrea-test/np1 UPDATE event

Versions:
Please provide the following information:

• ToT main with commit from Fix flakiness in Kind e2e flow aggregator tests #2308.
• On Jenkins dual-stack cluster testbed.

Additional context

[github-actions]

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