Added RequiredPermissionWarnings to 4 different commandlets

[NishkalankBezawada]

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https://github.com/pnp/powerShell/blob/dev/CONTRIBUTING.md

Type

• Bug Fix
• New Feature
• Sample

Related Issues?

Fixes #X, partially fixes #4478, mentioned in #4472 and #4353 , etc.

What is in this Pull Request ?

Add warning to GetAvailableSensitivityLabel, GetDeletedFlow, GetListItem, GetSite commandlets about required permissions. Details below,

Get-PnPAvailableSensitivityLabel

PS C:\Research\PnPCommunity\powershell> Get-PnPAvailableSensitivityLabel
Get-PnPAvailableSensitivityLabel: Forbidden (403):
PS C:\Research\PnPCommunity\powershell>

PS C:\Research\PnPCommunity\powershell> Get-PnPAvailableSensitivityLabel
WARNING: Current access token lacks the following required delegated permission scope on the resource Microsoft Graph:
InformationProtectionPolicy.Read

Get-PnPAvailableSensitivityLabel: Forbidden (403):
PS C:\Research\PnPCommunity\powershell>

Get-PnPSite

PS C:\Research\PnPCommunity\powershell> Get-PnPSite
Get-PnPSite: The remote server returned an error: (401) Unauthorized.
PS C:\Research\PnPCommunity\powershell>

PS C:\Research\PnPCommunity\powershell> Get-PnPSite
WARNING: Current access token lacks one of the following required application permission scopes on the resource SharePoint Online:
Sites.Selected
 or
Sites.Read.All
 or
Sites.ReadWrite.All
 or
Sites.Manage.All
 or
Sites.FullControl.All

Get-PnPSite: The remote server returned an error: (401) Unauthorized.
PS C:\Research\PnPCommunity\powershell>

Get-PnPListItem

PS C:\Research\PnPCommunity\powershell> Get-PnPListItem -List "DynamicFormTest" -PageSize 1000
Get-PnPListItem: The remote server returned an error: (401) Unauthorized.
PS C:\Research\PnPCommunity\powershell>

PS C:\Research\PnPCommunity\powershell> Get-PnPListItem -List "DynamicFormTest" -PageSize 1000
WARNING: Current access token lacks one of the following required application permission scopes on the resource SharePoint Online:
Sites.Selected
 or
Sites.Read.All
 or
Sites.ReadWrite.All
 or
Sites.Manage.All
 or
Sites.FullControl.All

Get-PnPListItem: The remote server returned an error: (401) Unauthorized.
PS C:\Research\PnPCommunity\powershell>

Get-PnPSiteVersionPolicy

Set-PnPSiteVersionPolicy

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