ignore test_proactive_connection_close_detection until we introduce TaskTracket to streamer

[KirillLykov]

Problem

Without TaskTracker, this test is not really deterministic as explained here #8066

Summary of Changes

[mergify]

automerge label removed due to a CI failure

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.1%. Comparing base (36e79fb) to head (0eae8b3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##           master    #8193     +/-   ##
=========================================
- Coverage    83.1%    83.1%   -0.1%     
=========================================
  Files         828      828             
  Lines      364666   364666             
=========================================
- Hits       303311   303266     -45     
- Misses      61355    61400     +45     

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