[Bugfix] GR1 V6 Fix compliance status for single column UPN list

[dutt0]

Overview/Summary

This Pull Request fixes compliance status for the following:

1. When the required file is uploaded with the correct headers but only included the highly privileged UPNs - GR1 | Validation 6 | Incorrect Compliance Status - Use Case for Missing Information in Second Column - Bug #331
2. When the required file is uploaded with the correct headers but only included the regular UPNs - GR1 | Validation 6 | Incorrect Compliance Status - Use Case for Missing Information in First Column - Bug #332
3. When the required file is uploaded with one header only and included the highly privileged UPNs
4. When the required file is uploaded with one header only and included the regular UPNs
5. When the required file is uploaded with both headers but headers and data has semicolon in-between, hence its read as single column csv

This PR fixes/adds/changes/removes

This pull request adds the logic for the above test cases

Breaking Changes

N/A

Testing Evidence

As part of this Pull Request I have

• Checked for duplicate Pull Requests
• Associated it with relevant GitHub Issues
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated relevant and associated documentation.
• Ensure PowerShell module versions have been updated (manually or with the ./tools/Update-ModuleVersions.ps1 script)