Fix error when tenant has no licenses

[Jeff-Jerousek]

🗣 Description

Running on a new tenant with no licenses in use Get-MgBetaSubscribedSku will return with a body of [].

💭 Motivation and context

$LicenseInfo was not verifying $SubscribedSku had data before creating the variable that will be used in the report, resulting in a JSON primitive error because the JSON is "license_information": ,

🧪 Testing

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