Kafka output SCRAM authentication not working - missing protocol handler

[jpedrosa94]

Bug Description

The Kafka output accepts SCRAM-SHA-256 and SCRAM-SHA-512 SASL mechanism configuration but doesn't implement the actual SCRAM protocol handler, causing authentication to fail.

Current Behavior

When configuring Kafka output with SCRAM authentication:

outputs:
  - name: kafka-sink
    type: kafka
    config:
      brokers: kafka.example.com:9094
      tls: true
      sasl:
        mechanism: SCRAM-SHA-512
        user: username
        password: password