add remove_file in client-go util directory

staging/src/k8s.io/client-go/util/testing/remove_file.go

@@ -0,0 +1,40 @@
+/*
+Copyright 2023 The Kubernetes 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 testing
+
+import (
+	"os"
+	"testing"
+)
+
+// CloseAndRemove is a helper to close and remove test file.
+func CloseAndRemove(t *testing.T, files ...*os.File) {
+	t.Helper()
+	// We should close it first before remove a file, it's not only a good practice,
+	// but also can avoid failed file removing on Windows OS.
+	for _, f := range files {
+		if f == nil {
+			continue
+		}
+		if err := f.Close(); err != nil {
+			t.Fatalf("Error closing %s: %v", f.Name(), err)
+		}
+		if err := os.Remove(f.Name()); err != nil {
+			t.Fatalf("Error removing %s: %v", f.Name(), err)
+		}
+	}
+}