Rename watcher parameter in diagnostic tool

[arunans23]

$subject

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 24.32%. Comparing base (2bb5a39) to head (a984da2).
Report is 13 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master   #13461   +/-   ##
=========================================
  Coverage     24.32%   24.32%           
  Complexity     1243     1243           
=========================================
  Files           254      254           
  Lines         11495    11495           
  Branches       1200     1200           
=========================================
  Hits           2796     2796           
  Misses         8672     8672           
  Partials         27       27           

Flag	Coverage Δ
integration_tests	24.32% <ø> (ø)

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