[Bugfix] GR1 V1 MFA reporting for guest user

[dutt0]

Overview/Summary

This pull request fixes the false non-compliance reporting of some guest user accounts MFA

This PR fixes/adds/changes/removes

This PR uses different strategies while checking auth method for guest users.

Breaking Changes

N/A

Testing Evidence

Tested in both tenants.

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)