Debug parameter now sets debugpreference to continue (#8195)

With this commit, users who invoke a command with -Debug will no longer be presented with a prompt asking them if they want to enter a nested prompt, continue execution, or halt execution entirely. Instead, any messages sent to the debug stream will simply be sent to the debug stream and the script will continue execution.

test/powershell/Modules/Microsoft.PowerShell.Utility/Write-Stream.Tests.ps1

@@ -10,7 +10,7 @@ Describe "Stream writer tests" -Tags "CI" {
         [CmdletBinding()]
 
         param()
-        If ($PSBoundParameters['Debug']) { $DebugPreference = 'Continue' }
+
         Write-Verbose "Verbose message"
 
         Write-Debug "Debug message"