Grant-UcmOffice365UserLicence no longer works due to deprecation of Set-MsolUserLicence

[Atreidae]

Need to update Grant-UcmOffice365UserLicence to use set-mguserlicense instead

[Atreidae]

https://learn.microsoft.com/en-us/powershell/module/microsoft.graph.users.actions/set-mguserlicense?view=graph-powershell-1.0

[Atreidae]

Todo. add graph connection checking

[Atreidae]

Implementation of this fix will be a breaking change as it now requires grpah permissions for the user and the tenancy.
Due to the fact the MSOL is depercated already. I would say this is already "broken"
but its something I should call out in the change notes.