Ignore fifo error when using v2 multi-container shim

When using a multi-container shim, the fifo of the 2nd to Nth container
will not be opened when the ctx is done. This will cause an
`ErrReadClosed` that can be ignored.

Signed-off-by: Li Yuxuan <liyuxuan04@baidu.com>

runtime/v2/shim_windows_test.go

@@ -0,0 +1,41 @@
+/*
+   Copyright The containerd Authors.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+*/
+
+package v2
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/pkg/errors"
+)
+
+func TestCheckCopyShimLogError(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	testError := errors.New("test error")
+
+	if err := checkCopyShimLogError(ctx, nil); err != nil {
+		t.Fatalf("should return the actual error except ErrNotExist, but %v", err)
+	}
+	if err := checkCopyShimLogError(ctx, testError); err != testError {
+		t.Fatalf("should return the actual error except ErrNotExist, but %v", err)
+	}
+	if err := checkCopyShimLogError(ctx, os.ErrNotExist); err != nil {
+		t.Fatalf("should return nil for ErrNotExist, but %v", err)
+	}
+}