Import Windows manifest into test build, rather than copying by script

This will ensure that we can always get the current Windows OS build
version, without being put into Windows 8 compatibility mode.

Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>

client_windows_test.go

@@ -22,6 +22,7 @@ import (
 	"path/filepath"
 
 	"github.com/Microsoft/hcsshim/osversion"
+	_ "github.com/Microsoft/hcsshim/test/functional/manifest" // For rsrc_amd64.syso
 )
 
 const (
@@ -53,9 +54,6 @@ func init() {
 		testImage = "mcr.microsoft.com/windows/nanoserver:1909"
 	case 19041: // this isn't in osversion yet, but the image should be available
 		testImage = "mcr.microsoft.com/windows/nanoserver:2004"
-	case 9200: // Missing manifest, so it's running in compatibility mode
-		fmt.Println("You need to copy Microsoft/hcsshim/test/functional/manifest/rsrc_amd64.syso into the containerd checkout")
-		panic("Running in Windows 8/Windows Server 2012 compatibility mode, failed to detect Windows build version")
 	default:
 		fmt.Println("No test image defined for Windows build version:", b)
 		panic("No windows test image found for this Windows build")