Re-activate disabled istio tls tests

[ReToCode]

Proposed Changes

• Reverts a08915c
• Reverts 0e7d154

/assign @skonto
/assign @dprotaso

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.09%. Comparing base (21ec47d) to head (0b3a5b7).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14995      +/-   ##
==========================================
- Coverage   84.13%   84.09%   -0.05%     
==========================================
  Files         213      213              
  Lines       16687    16687              
==========================================
- Hits        14040    14033       -7     
- Misses       2298     2303       +5     
- Partials      349      351       +2     

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[ReToCode]

For unit-test fail: #14996

[ReToCode]

/test unit-tests

[dprotaso]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dprotaso, ReToCode

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