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/internal/log/format.go

@@ -104,6 +104,7 @@ func encode(v interface{}) (_ []byte, err error) {
 	if jErr := enc.Encode(v); jErr != nil {
 		if err != nil {
 			// TODO (go1.20): use multierror via fmt.Errorf("...: %w; ...: %w", ...)
+			//nolint:errorlint // non-wrapping format verb for fmt.Errorf
 			return nil, fmt.Errorf("protojson encoding: %v; json encoding: %w", err, jErr)
 		}
 		return nil, fmt.Errorf("json encoding: %w", jErr)