Replace pkger with embed.FS compatibility

kyaml/fn/framework/example/main_test.go

@@ -0,0 +1,17 @@
+// Copyright 2021 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package main
+
+import (
+	"testing"
+
+	"sigs.k8s.io/kustomize/kyaml/fn/framework/frameworktestutil"
+)
+
+func TestRun(t *testing.T) {
+	prc := frameworktestutil.CommandResultsChecker{
+		Command: buildCmd,
+	}
+	prc.Assert(t)
+}