[CI] Set persist-credentials: false for actions/checkout steps

[jbampton]

Description

This PR...

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)
• Build/CI
• Test (unit or integration test code)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

How did you try to break this feature and the system with this change?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 17.76%. Comparing base (e47d7bc) to head (ab57b58).

Additional details and impacted files

@@            Coverage Diff            @@
##               main   #12385   +/-   ##
=========================================
  Coverage     17.76%   17.76%           
  Complexity    15861    15861           
=========================================
  Files          5923     5923           
  Lines        530536   530536           
  Branches      64826    64826           
=========================================
  Hits          94252    94252           
  Misses       425740   425740           
  Partials      10544    10544           

Flag	Coverage Δ
uitests	3.57% <ø> (ø)
unittests	18.85% <ø> (ø)

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