AIP-84 Migrate the public endpoint Get DAG Stats to FastAPI

[omkar-foss]

Description

Currently the Get DAG Stats public endpoint is at api_connexion/endpoints/dag_stats_endpoint.py under get_dag_stats. We need to migrate it to the api_fastapi/views/public/dag_stats.py under a get_dag_stats or similar.

Use case/motivation

AIP-84 cWiki Link: https://cwiki.apache.org/confluence/display/AIRFLOW/AIP-84+UI+REST+API

Related issues

Related to: #42370

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct