Add cimfs differ and snapshotter

Details about CimFs project are discussed in #8346

Signed-off-by: Amit Barve <ambarve@microsoft.com>

vendor/github.com/Microsoft/hcsshim/pkg/cimfs/cimfs.go

@@ -0,0 +1,17 @@
+//go:build windows
+// +build windows
+
+package cimfs
+
+import (
+	"github.com/Microsoft/hcsshim/osversion"
+	"github.com/sirupsen/logrus"
+)
+
+func IsCimFSSupported() bool {
+	rv, err := osversion.BuildRevision()
+	if err != nil {
+		logrus.WithError(err).Warn("get build revision")
+	}
+	return osversion.Build() == 20348 && rv >= 2031
+}