Refactor Scalers with new declarative scaler config

[dttung2905]

Proposal

We can take turn implement the changes in this PR https://github.com/kedacore/keda/pull/5676. This is related to the original issue here https://github.com/kedacore/keda/issues/5037. I can take the kafka one since I have been working on something similar in https://github.com/kedacore/keda/pull/5319

• [x] activemq_scaler.go https://github.com/kedacore/keda/pull/5799
• [x] apache_kafka_scaler.go https://github.com/kedacore/keda/pull/5804
• [x] arangodb_scaler.go https://github.com/kedacore/keda/pull/5808
• [x] artemis_scaler.go https://github.com/kedacore/keda/pull/5836
• [x] aws_cloudwatch_scaler.go https://github.com/kedacore/keda/pull/5852
• [ ] aws_dynamodb_scaler.go
• [ ] aws_dynamodb_streams_scaler.go
• [ ] aws_kinesis_stream_scaler.go
• [ ] aws_sqs_queue_scaler.go
• [ ] azure_app_insights_scaler.go
• [ ] azure_blob_scaler.go
• [ ] azure_data_explorer_scaler.go
• [ ] azure_eventhub_scaler.go
• [ ] azure_log_analytics_scaler.go
• [ ] azure_monitor_scaler.go
• [ ] azure_pipelines_scaler.go
• [ ] azure_queue_scaler.go
• [ ] azure_servicebus_scaler.go
• [ ] cassandra_scaler.go
• [ ] couchdb_scaler.go
• [ ] cpu_memory_scaler.go
• [ ] cron_scaler.go
• [ ] datadog_scaler.go
• [ ] elasticsearch_scaler.go
• [ ] etcd_scaler.go
• [ ] external_mock_scaler.go
• [ ] external_scaler.go
• [ ] gcp_cloud_tasks_scaler.go
• [ ] gcp_pubsub_scaler.go
• [ ] gcp_stackdriver_scaler.go
• [ ] gcp_storage_scaler.go
• [ ] github_runner_scaler.go
• [ ] graphite_scaler.go
• [ ] huawei_cloudeye_scaler.go
• [ ] ibmmq_scaler.go
• [ ] influxdb_scaler.go
• [ ] kafka_scaler.go
• [ ] kubernetes_workload_scaler.go
• [ ] liiklus_scaler.go
• [ ] loki_scaler.go
• [ ] metrics_api_scaler.go
• [ ] mongo_scaler.go
• [ ] mssql_scaler.go
• [ ] mysql_scaler.go
• [ ] nats_jetstream_scaler.go
• [ ] newrelic_scaler.go
• [ ] openstack_metrics_scaler.go
• [ ] openstack_swift_scaler.go
• [ ] postgresql_scaler.go
• [ ] predictkube_scaler.go
• [ ] prometheus_scaler.go
• [ ] pulsar_scaler.go
• [ ] rabbitmq_scaler.go
• [ ] redis_scaler.go
• [ ] redis_streams_scaler.go
• [ ] selenium_grid_scaler.go
• [ ] solace_scaler.go
• [x] solr_scaler.go https://github.com/kedacore/keda/pull/5818
• [ ] stan_scaler.go

Use-Case

No response

Is this a feature you are interested in implementing yourself?

Yes

Anything else?

No response

[SpiritZhou]

I can help to do some of them.

[dttung2905]

Sure. Me and @wozniakjan is doing from top down. May be you want to try doing from bottom up?

[wozniakjan]

fyi @SpiritZhou, @dttung2905 no need to introduce changelog entry for each PR, it will be mentioned in one place - https://github.com/kedacore/keda/pull/5799#discussion_r1604839131