Migrate away from ioutil

[perdasilva]

Move away from ioutil as it has been deprecated since go1.16

[openshift-ci]

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 37.78%. Comparing base (aa24971) to head (1cff5d5).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #463   +/-   ##
=======================================
  Coverage   37.78%   37.78%           
=======================================
  Files          57       57           
  Lines        4557     4557           
=======================================
  Hits         1722     1722           
  Misses       2678     2678           
  Partials      157      157           

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