WIP: Add retry checker for DNS failure from Ingress

[nak3]

This patch fixes the recent flake in service_to_service_test.go on Kind/Istio.
istio-ingressgateway returns 502 with no such host error when it fails to resolve the cluster domain.

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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[codecov]

Codecov Report

Merging #12294 (2c10142) into main (d46d51a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main   #12294   +/-   ##
=======================================
  Coverage   87.29%   87.29%           
=======================================
  Files         195      195           
  Lines        9610     9610           
=======================================
  Hits         8389     8389           
  Misses        940      940           
  Partials      281      281           

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[knative-prow-robot]

@nak3: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-knative-serving-build-tests	2c10142	link	true	/test pull-knative-serving-build-tests

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