KafkaAsyncExecutor : Be able to support different Kafka providers

[twobeeb]

Currently, the only Kafka method in KafkaAsyncExecutor for creating Topics is by using AdminClient
While it's probably going to cover 100% of Kafka provider, the same cannot be said regarding ACL or user creation:

• ACL could be managed multiple ways
  • using AdminClient (probably most use cases)
  • using Confluent RBAC (because why not)
• SCRAM Users can be created :
  • With ZK as of now
  • With Admin Client for on prem instances starting Kafka 2.7.0
  • With API calls on Confluent API for Confluent Cloud
  • With <other_method> call on <other_provider>

All of this points to adding a new layer of abstraction in order to be able to manage different resource creation/updation methods depending on provider/on-prem

Discussion is required in order to find the best way to rewrite this.