[Automated] Update net-istio nightly

[knative-automation]

/assign @knative/serving-writers
/cc @knative/serving-writers

Produced via:

for x in net-istio.yaml; do
  curl https://storage.googleapis.com/knative-nightly/net-istio/latest/$x > ${GITHUB_WORKSPACE}/./third_party/istio-latest/$x
done

Details:

bumping knative.dev/net-istio 872cb3e...3cc8e7c:
  > 3cc8e7c bump istio 1.22.1 (# 1336)

[knative-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.56%. Comparing base (faf421a) to head (4888e08).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15338      +/-   ##
==========================================
+ Coverage   84.49%   84.56%   +0.06%     
==========================================
  Files         219      219              
  Lines       13548    13548              
==========================================
+ Hits        11448    11457       +9     
+ Misses       1731     1725       -6     
+ Partials      369      366       -3     

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