AIP-84 Migrate the public endpoint Delete DAG to FastAPI #42650

Description

The Delete DAG public endpoint is at api_connexion/endpoints/dag_endpoint.py under delete_dag. We need to migrate it to the api_fastapi/views/public/dags.py under a delete_dag or similar.

Features and functionality of the endpoint will remain unchanged.

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