Update ctr so it works again on windows

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>

server/server_windows.go

@@ -0,0 +1,16 @@
+// +build windows
+
+package server
+
+import "context"
+
+const (
+	// DefaultAddress is the default winpipe address
+	DefaultAddress = `\\.\pipe\containerd-containerd`
+	// DefaultDebugAddress is the default winpipe address for pprof data
+	DefaultDebugAddress = `\\.\pipe\containerd-debug`
+)
+
+func apply(_ context.Context, _ *Config) error {
+	return nil
+}