[chore] add goleak tests for prometheusreceiver (open-telemetry#31630)

Related to
open-telemetry#30438

---------

Signed-off-by: Israel Blancas <[email protected]>

Author: iblancasa

receiver/prometheusreceiver/go.mod

@@ -27,6 +27,7 @@ require (
 	go.opentelemetry.io/collector/semconv v0.96.1-0.20240306115632-b2693620eff6
 	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
 	google.golang.org/protobuf v1.33.0
 	gopkg.in/yaml.v2 v2.4.0

receiver/prometheusreceiver/package_test.go

@@ -0,0 +1,17 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package prometheusreceiver
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+// The IgnoreTopFunction call prevents catching the leak generated by opencensus
+// defaultWorker.Start which at this time is part of the package's init call.
+// See https://github.com/census-instrumentation/opencensus-go/issues/1191 for more information.
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m, goleak.IgnoreTopFunction("go.opencensus.io/stats/view.(*worker).start"))
+}