Fix native executables not redirecting to file (#19842)

test/powershell/engine/Basic/NativeCommandBytePiping.Tests.ps1

@@ -63,4 +63,18 @@ Describe 'Native command byte piping tests' -Tags 'CI' {
             ($pipe)?.Dispose()
         }
     }
+
+    It 'Bytes are retained when redirecting to a file' {
+        testexe -writebytes FF > $TestDrive/content.bin | Should -BeNullOrEmpty
+        Get-Content -LiteralPath $TestDrive/content.bin -AsByteStream | Should -Be 0xFFuy
+    }
+
+    It 'Bytes are retained when redirecting to a file and Out-Default is downstream' {
+        testexe -writebytes FF > $TestDrive/content2.bin | Out-Default
+        Get-Content -LiteralPath $TestDrive/content2.bin -AsByteStream | Should -Be 0xFFuy
+    }
+
+    It 'Redirecting to $null should emit no output' {
+        testexe -writebytes FF > $null | Should -BeNullOrEmpty
+    }
 }