Add disable-insider-ui-page.ps1 (#34499)

This script disables the UI page where users can opt into the Windows
insider program.


# Checklist for submitter

If some of the following don't apply, delete the relevant line.

## Testing

- [x] QA'd all new/changed functionality manually

---------

Co-authored-by: Dale Ribeiro <dale@fleetdm.com>

docs/solutions/windows/scripts/disable-insider-ui-page.ps1

@@ -0,0 +1,9 @@
+# Disable Windows Insider opt-in UI page
+
+# Verify that the registry path exists, and creates it if not.
+$regPath = "HKLM:\SOFTWARE\Microsoft\WindowsSelfHost\UI\Visibility"
+if (!(Test-Path $regPath)) {
+    New-Item -Path $regPath -Force | Out-Null
+}
+#Set DWord value to hide the Windows insider page under Windows Update
+Set-ItemProperty -Path $regPath -Name "HideInsiderPage" -Value 1 -Type DWord