[7.0.2 Cherry-pick] Tests | Disable Async cancellation tests on Kerberos/Managed Instance pipelines

[github-actions]

Cherry-pick of #4311 (4a4bd9d) into release/7.0.

[cheenamalhotra]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 2 pipeline(s).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.56%. Comparing base (1b18a27) to head (87375d0).
⚠️ Report is 4 commits behind head on release/7.0.

❗ There is a different number of reports uploaded between BASE (1b18a27) and HEAD (87375d0). Click for more details.

HEAD has 3 uploads less than BASE

Flag	BASE (1b18a27)	HEAD (87375d0)
CI-SqlClient	3	0

Additional details and impacted files

@@               Coverage Diff               @@
##           release/7.0    #4316      +/-   ##
===============================================
- Coverage        73.33%   65.56%   -7.78%     
===============================================
  Files              280      275       -5     
  Lines            43025    65852   +22827     
===============================================
+ Hits             31553    43175   +11622     
- Misses           11472    22677   +11205     

Flag	Coverage Δ
CI-SqlClient	?
PR-SqlClient-Project	65.56% <ø> (?)

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