exporter: add name to containerPort

Named containerPort is a useful feature when generating dynamic scrape
targets with prometheus.

This makes it clear that the containerPort is intended for metrics
scraping.

The name matches that which is on the mgr deployment.

Signed-off-by: Justin Cichra <jcichra@cloudflare.com>
(cherry picked from commit 12c36e9472)

pkg/operator/ceph/cluster/nodedaemon/exporter.go

@@ -196,6 +196,7 @@ func getCephExporterDaemonContainer(cephCluster cephv1.CephCluster, cephVersion
 	}
 
 	containerPort := corev1.ContainerPort{
+		Name:          "http-metrics",
 		ContainerPort: int32(DefaultMetricsPort),
 		Protocol:      corev1.ProtocolTCP,
 	}