New-azdisk / new-azdiskconfig fails in powershell workflow

### Description

weird problem im getting in a powershell workflwo call trying to create an azure disk using New-AZDisk the command will absolutely not run in a powershell workflow works fine NOT in a powershell workflow.
```
$vmRSG = Get-AZResourceGroup -name Test
$labName = "dhcp"
$location = "westus3"
$labServers = @("DC1","DC2","DHCP1")
$snapshotRSG = "DOD-LabVMSnapShots"
Workflow t {
param ($snapshotRSG, $labServers, $labName, $location, $vmRSG)
foreach -parallel ($d in $labServers){
$d
$snapshotRSG
$s = Get-AzSnapshot -ResourceGroupName "$snapshotRSG" -SnapshotName "$($d)-$($labName)-Snapshot" | ? {$_.Tags['Active'] -eq "Yes" -and $_.Tags['Lab'] -eq $labName}
$s.Name
$dConfig = New-AzDiskConfig -Location "$location" -SourceResourceId $s.Id -CreateOption Copy
$dconfig
$disk1 = New-AzDisk -ResourceGroupName $vmRSG.ResourceGroupName -DiskName "Hello" -Disk $dconfig
}
}
t $snapshotRSG $labServers $labName $location $vmRSG `
```

The errors that get thrown are:
```
Microsoft.PowerShell.Utility\Write-Error : Cannot bind parameter 'Disk'. Cannot convert value "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" to type "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk".
Error: "Cannot convert the "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" value of type "Deserialized.Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" to type
"Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk"."
At t:10 char:10
+
    + CategoryInfo          : NotSpecified: (:) [Write-Error], RemoteException
    + FullyQualifiedErrorId : System.Management.Automation.RemoteException,Microsoft.PowerShell.Commands.WriteErrorCommand
    + PSComputerName        : [localhost]
```
### Issue script & Debug output

```PowerShell
$vmRSG = Get-AZResourceGroup -name Test
$labName = "dhcp"
$location = "westus3"
$labServers = @("DC1","DC2","DHCP1")
$snapshotRSG = "DOD-LabVMSnapShots"
Workflow t {
param ($snapshotRSG, $labServers, $labName, $location, $vmRSG)
foreach -parallel ($d in $labServers){
$d
$snapshotRSG
$s = Get-AzSnapshot -ResourceGroupName "$snapshotRSG" -SnapshotName "$($d)-$($labName)-Snapshot" | ? {$_.Tags['Active'] -eq "Yes" -and $_.Tags['Lab'] -eq $labName}
$s.Name
$dConfig = New-AzDiskConfig -Location "$location" -SourceResourceId $s.Id -CreateOption Copy
$dconfig
$disk1 = New-AzDisk -ResourceGroupName $vmRSG.ResourceGroupName -DiskName "Hello" -Disk $dconfig
}
}
t $snapshotRSG $labServers $labName $location $vmRSG
```

### Environment data

```PowerShell
5.1
```

### Module versions

```PowerShell
Az.Compute Module 4.30.0
```

### Error output

```PowerShell
Microsoft.PowerShell.Utility\Write-Error : Cannot bind parameter 'Disk'. Cannot convert value "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" to type "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk".
Error: "Cannot convert the "Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" value of type "Deserialized.Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk" to type
"Microsoft.Azure.Commands.Compute.Automation.Models.PSDisk"."
At t:10 char:10
+
    + CategoryInfo          : NotSpecified: (:) [Write-Error], RemoteException
    + FullyQualifiedErrorId : System.Management.Automation.RemoteException,Microsoft.PowerShell.Commands.WriteErrorCommand
    + PSComputerName        : [localhost]
```

Reproduce the supplied PowerShell 5.1 workflow with Az.Compute 4.30.0, then inspect New-AzDiskConfig and New-AzDisk around the workflow's serialization boundary. Done means the workflow can pass the disk configuration to New-AzDisk without the Deserialized.PSDisk conversion error, with coverage for this workflow scenario.

Written by the indexing model from the issue text.