refactor: rename test helper for clarity

[G-Rath]

I think there are even better names we could use for both of these helpers, but given we're not using them that much for now I've just fixed the most immediate issue with the current name

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 69.33%. Comparing base (6437180) to head (8d40405).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/testutility/utility.go	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1601   +/-   ##
=======================================
  Coverage   69.33%   69.33%           
=======================================
  Files         200      200           
  Lines       19042    19042           
=======================================
  Hits        13202    13202           
  Misses       5134     5134           
  Partials      706      706           

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