Upgrade Kafka Avro Orbit bundles to the latest confluent version v7.6.0

[PasinduGunarathne]

Description:

Upgrade Kafka Avro Orbit bundles to compatible for the latest confluent version v7.6.0

Steps to reproduce:

Start MI server with following orbit bundles

• kafka-avro-serializer-7.3.1.wso2v1.jar
• kafka-schema-registry-client-7.3.1.wso2v1.jar

Related Issues:

PR : #1097