If Invoke-IncrementalBackup is run from a non admin shell it will create the base folders and increment the incremental backup count

[brandonmcclure]

To Reproduce
Create a incremental backup job. and run as a non admin:

New-BackupJob -Name Test -SourcePath C:\temp\gitRepo -DestinationPath C:\temp\backup -BackupProvider $(Get-AllowedBackupProviders -Name 'pwsh')

Get-BackupJob Test | Invoke-BackupJob

Expected behavior
Backup job should fail with an exception that it canot run as an admin. The incremental backup should not be incremented.