Add Meter name to Kafka Metrics (#2649)

* Add Meter name to Kafka Metrics

* Correct styling of meter name

* Apply suggestions from code review

* Apply suggestions from code review

---------

Co-authored-by: David Pine <david.pine@microsoft.com>

Author: afscrome

docs/messaging/kafka-integration.md

@@ -334,14 +334,15 @@ The .NET Aspire Apache Kafka integration dos not emit distributed traces.
 
 The .NET Aspire Apache Kafka integration emits the following metrics using OpenTelemetry:
 
-- `messaging.kafka.network.tx`
-- `messaging.kafka.network.transmitted`
-- `messaging.kafka.network.rx`
-- `messaging.kafka.network.received`
-- `messaging.publish.messages`
-- `messaging.kafka.message.transmitted`
-- `messaging.receive.messages`
-- `messaging.kafka.message.received`
+- `Aspire.Confluent.Kafka`
+  - `messaging.kafka.network.tx`
+  - `messaging.kafka.network.transmitted`
+  - `messaging.kafka.network.rx`
+  - `messaging.kafka.network.received`
+  - `messaging.publish.messages`
+  - `messaging.kafka.message.transmitted`
+  - `messaging.receive.messages`
+  - `messaging.kafka.message.received`
 
 ## See also