Invoke-Item.Tests.ps1 handles finding multiple ping executables.

[kalgiz]

PR Summary

Invoke-Item.Tests.ps1 handles finding multiple ping executables. Issue #5220

PR Checklist

Note: Please mark anything not applicable to this PR NA.

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• [NA] User facing Documentation needed
  • [NA] Issue filed - Issue link:
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• [NA] Make sure you've added a new test if existing tests do not effectively test the code changed
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