[kafka-source] Connector does not support AWS MSK IAM

[nickcopley-sa]

Connector Name

source-kafka

Connector Version

0.3.0

What step the error happened?

Configuring a new connector

Relevant information

AWS MSK using IAM requires that you add a jar to the classpath as per https://github.com/aws/aws-msk-iam-auth. It also uses a slightly different handler to the OAuthBearer handler which is currently hardcoded for SASL/OAUTHBEARER

Relevant log output

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