[Feature] Standardize airflow2 resources
We are no longer using airflow1, Airflow2 was introduced in Release M9 (0.12), slowly adopted by all CSP's. We are now in M17 and still maintaining airflow1 resources.
In dp resources airflow2_enabled deploy_dp_airflow dp_airflow_aks_version variables are misleading, which seems to be relying one from another on data partition stages.
Variable airflow2_enabled will not have any effect if deploy_dp_airflow it is not enabled either, we have a mess of airflow options that would be wise to standardize and refactor all the infra/helm code to use only airflow2 in the upcoming releases if no one is using anymore airflow1.