[chore][receiver/pulsar] Enable goleak check (#32195)

Enable `goleak` testing on the Pulsar receiver to help ensure no
goroutines are being leaked.

**Link to tracking Issue:** #30438

receiver/pulsarreceiver/go.mod

@@ -20,6 +20,7 @@ require (
 	go.opentelemetry.io/collector/semconv v0.97.1-0.20240404121116-4f1a8936d26b
 	go.opentelemetry.io/otel/metric v1.24.0
 	go.opentelemetry.io/otel/trace v1.24.0
+	go.uber.org/goleak v1.3.0
 	go.uber.org/zap v1.27.0
 )
 

receiver/pulsarreceiver/package_test.go

@@ -0,0 +1,15 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package pulsarreceiver
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+// Regarding the godbus/dbus ignore: see https://github.com/99designs/keyring/issues/103
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m, goleak.IgnoreAnyFunction("github.com/godbus/dbus.(*Conn).inWorker"))
+}