Replace BinaryFormatter with PSSerializer

Since the former has been removed from PowerShell 7.4 (because it was
removed from .NET 7) and the latter can accomplish the same thing.

The default depth is 1, so we need to specify. Best I could find was
that the prior implementation defaulted to a depth of 64, so we're going
with that.

Author: andyleejordan

Helpers.ps1

@@ -394,14 +394,8 @@ function DeepCopy-Object
         [PSCustomObject] $InputObject
     )
 
-    $memoryStream = New-Object System.IO.MemoryStream
-    $binaryFormatter = New-Object System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
-    $binaryFormatter.Serialize($memoryStream, $InputObject)
-    $memoryStream.Position = 0
-    $DeepCopiedObject = $binaryFormatter.Deserialize($memoryStream)
-    $memoryStream.Close()
-
-    return $DeepCopiedObject
+    $serialData = [System.Management.Automation.PSSerializer]::Serialize($InputObject, 64)
+    return [System.Management.Automation.PSSerializer]::Deserialize($serialData)
 }
 
 function New-TemporaryDirectory