New-AzResourceGroupDeployment should not execute whatif when ConfirmPreference== ConfirmImpact.None

## Description
Setting `ConfirmImpact.None` has the same behavior as setting `ConfirmImpact.Low` when executing the New-AzResourceGroupDeployment and executes the WhatIf behavior

## Steps to reproduce

```powershell

$ConfirmPreference = "None"
New-AzResourceGroupDeployment [...]
```
The bug is in `ShouldProcessGivenCurrentConfirmFlagAndPreference`
```csharp
private bool ShouldProcessGivenCurrentConfirmFlagAndPreference()
{
if (this.MyInvocation.BoundParameters.GetOrNull("Confirm") is SwitchParameter confirmFlag)
{
return confirmFlag.IsPresent;
}

if (this.SessionState == null)
{
return false;
}

var confirmPreference = (ConfirmImpact)this.SessionState.PSVariable.GetValue("ConfirmPreference");

return this.ConfirmImpact >= confirmPreference;
}
```
specifically
```csharp
return this.ConfirmImpact >= confirmPreference;
```
should be
```csharp
return confirmPreference != ConfirmImpact.None && this.ConfirmImpact >= confirmPreference;
```

## Module versions
5.4.0

## workaround
```powershell
if($ConfirmPreference -eq "None") {
New-AzResourceGroupDeployment [...] -Confirm:$false
} else {
New-AzResourceGroupDeployment [...]
}
```