[BUG] bootstrap_servers is not configurable for Kafka Source in AWS

Describe the bug
Creating an opensearch pipeline in AWS is not possible using the following yaml:

version: '2' kafka-pipeline: source: kafka: bootstrap_servers: - '100.100.100.100:9092' topics: - name: Topic1 group_id: groupID1 sink: - opensearch: hosts: [ "https://XXXX.eu-central-1.amazonaws.com" ] aws: sts_role_arn: "arn:aws:iam::XXXXXXX:role/AWSROLE" region: "eu-central-1" index: "index_123"

It returns an error with the following message:

"kafka.bootstrap_servers" is not configurable parameter for Amazon OpenSearch Ingestion pipelines using an aws kafka source: "$['log-pipeline']['source']['kafka']".

To Reproduce
Steps to reproduce the behavior:

1. Go to Opensearch Ingestion Pipelines
2. Create a new pipeline
3. Paste the yaml and validate
4. See error

Expected behavior
It should be valid and start a pipeline

Screenshots

Environment (please complete the following information):

• AWS eu-central-1
• OpenSearch Cluster Version 2.11 (AWS Latest)
• Service Software Version: OpenSearch_2_11_R20231113-P2 (latest)

Start by tracing the Kafka source configuration and the AWS OpenSearch Ingestion validation that rejects bootstrap_servers. Reproduce the reported YAML validation error, then verify that the setting is accepted and the pipeline can start without the configurable-parameter error.