Default TLS certificate shouldn't be applied to cluster local routes

[dprotaso]

Release Note

Setting a `default-tls-secret` in `config-contour` no longer applies this secret to cluster local routes

[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.96%. Comparing base (80ccaca) to head (5e96a65).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1111   +/-   ##
=======================================
  Coverage   93.96%   93.96%           
=======================================
  Files          11       11           
  Lines         712      712           
=======================================
  Hits          669      669           
  Misses         22       22           
  Partials       21       21           

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[dprotaso]

/assign @izabelacg

[izabelacg]

/lgtm