test: fix TAV=kafkajs tests (#4773)

Kafka TAV tests (which run in docker) had been failing with:
    KafkaJSConnectionError: Connection error: connect ECONNREFUSED 127.0.0.1:9094

even though the client was configured to connect to `kafka:9094`.
Where did the "127.0.0.1" (or "localhost") come from?
The answer is from the Kafka broker metadata, which comes
from the `KAFKA_ADVERTISED_LISTENERS` config.
Explanation at https://www.confluent.io/blog/kafka-listeners-explained/

TIL: A Kafka client's initial options include broker host/port details.
That is used for the initial (seed) connection to get broker metadata.
The metadata includes connection details, which can depend the topic(s).

Author: trentm

.ci/docker/docker-compose.yml

@@ -155,7 +155,7 @@ services:
       - "KAFKA_NODE_ID=1"
       - "KAFKA_PROCESS_ROLES=broker,controller"
       - "KAFKA_LISTENERS=PLAINTEXT://:9092,CONTROLLER://:9093,EXTERNAL://:9094"
-      - "KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9092,EXTERNAL://localhost:9094"
+      - "KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9092,EXTERNAL://kafka:9094"
       - "KAFKA_LISTENER_SECURITY_PROTOCOL_MAP=CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,EXTERNAL:PLAINTEXT"
       - "KAFKA_CONTROLLER_QUORUM_VOTERS=1@localhost:9093"
       - "KAFKA_CONTROLLER_LISTENER_NAMES=CONTROLLER"