[chore][receiver/namedpipe] Enable goleak check (#32200)

**Description:** <Describe what has changed.>
<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
Add `goleak` check to the namedpipe receiver to help ensure no
goroutines are being leaked.

**Link to tracking Issue:** <Issue number if applicable>
#30438

**Testing:** <Describe what testing was performed and which tests were
added.>
None yet, I'm running on macOS and this is a Linux-only receiver.
Relying on GitHub CI/CD to show results. I'll convert this to ready to
review if it passes.

receiver/namedpipereceiver/go.mod

@@ -12,6 +12,7 @@ require (
 	go.opentelemetry.io/collector/receiver v0.98.1-0.20240412014414-62f589864e3d
 	go.opentelemetry.io/otel/metric v1.25.0
 	go.opentelemetry.io/otel/trace v1.25.0
+	go.uber.org/goleak v1.3.0
 	go.uber.org/zap v1.27.0
 )
 

receiver/namedpipereceiver/namedpipe_test.go

@@ -63,6 +63,7 @@ func TestReadPipe(t *testing.T) {
 	rcvr, err := f.CreateLogsReceiver(context.Background(), receivertest.NewNopCreateSettings(), cfg, sink)
 	require.NoError(t, err, "failed to create receiver")
 	require.NoError(t, rcvr.Start(context.Background(), componenttest.NewNopHost()))
+	defer func() { require.NoError(t, rcvr.Shutdown(context.Background())) }()
 
 	pipe, err := os.OpenFile("/tmp/pipe", os.O_WRONLY, 0o600)
 	require.NoError(t, err, "failed to open pipe")

receiver/namedpipereceiver/package_test.go

@@ -0,0 +1,14 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package namedpipereceiver
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}