samples: add the otel enable flag to new otel samples

samples/listenWithOpenTelemetryTracing.js

@@ -80,7 +80,7 @@ provider.addSpanProcessor(processor);
 provider.register();
 
 // Creates a client; cache this for further use.
-const pubSubClient = new PubSub();
+const pubSubClient = new PubSub({enableOpenTelemetryTracing: true});
 
 async function subscriptionListen(subscriptionNameOrId) {
   const subscriber = pubSubClient.subscription(subscriptionNameOrId);

samples/publishWithOpenTelemetryTracing.js

@@ -80,7 +80,7 @@ provider.addSpanProcessor(processor);
 provider.register();
 
 // Creates a client; cache this for further use.
-const pubSubClient = new PubSub();
+const pubSubClient = new PubSub({enableOpenTelemetryTracing: true});
 
 async function publishMessage(topicNameOrId, data) {
   // Publishes the message as a string, e.g. "Hello, world!"

samples/typescript/listenWithOpenTelemetryTracing.ts

@@ -72,7 +72,7 @@ provider.addSpanProcessor(processor);
 provider.register();
 
 // Creates a client; cache this for further use.
-const pubSubClient = new PubSub();
+const pubSubClient = new PubSub({enableOpenTelemetryTracing: true});
 
 async function subscriptionListen(subscriptionNameOrId: string) {
   const subscriber = pubSubClient.subscription(subscriptionNameOrId);

samples/typescript/publishWithOpenTelemetryTracing.ts

@@ -72,7 +72,7 @@ provider.addSpanProcessor(processor);
 provider.register();
 
 // Creates a client; cache this for further use.
-const pubSubClient = new PubSub();
+const pubSubClient = new PubSub({enableOpenTelemetryTracing: true});
 
 async function publishMessage(topicNameOrId: string, data: string) {
   // Publishes the message as a string, e.g. "Hello, world!"