BUG 2019125: Remove replicates toggle for mwu test version

[kala-moz]

Fix for Bug 2019125. This PR hides the replicates toggle switch when the test version is Mann-Whitney-U

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.46%. Comparing base (c4be483) to head (1341999).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1006   +/-   ##
=======================================
  Coverage   96.45%   96.46%           
=======================================
  Files         108      108           
  Lines        3050     3053    +3     
  Branches      689      691    +2     
=======================================
+ Hits         2942     2945    +3     
  Misses        107      107           
  Partials        1        1           

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