[TEST-ONLY] testing cluster-local-domain-tls in Serving

[ReToCode]

/hold

WIP

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[knative-prow]

@ReToCode: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
unit-tests_serving_main	4a14d9e	link	true	/test unit-tests
istio-latest-no-mesh_serving_main	4a14d9e	link	true	/test istio-latest-no-mesh
kourier-stable_serving_main	4a14d9e	link	true	/test kourier-stable

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[knative-prow-robot]

PR needs rebase.

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