Fix search and replace for imagePullPolicy

[lucacome]

Proposed changes

Only replace the values that have a : in the yaml files

Closes #2780

Checklist

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• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

Release notes

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NONE

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.74%. Comparing base (619c127) to head (1cdde37).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2889   +/-   ##
=======================================
  Coverage   89.74%   89.74%           
=======================================
  Files         109      109           
  Lines       11150    11150           
  Branches       50       50           
=======================================
  Hits        10007    10007           
  Misses       1083     1083           
  Partials       60       60           

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[sjberman]

Rebasing should fix the pipeline issue. We'll also need to cherry pick this once merged.

[sjberman]

#2902 should fix the pipeline issue seen here