Handle task timeouts (`execution_timeout`) at supervisor

Body

Right now we handle these at the task runner (fork: https://github.com/apache/airflow/blob/main/task-sdk/src/airflow/sdk/execution_time/task_runner.py#L1149-L1165) instead of handling it at the supervisor. We should move the check to the supervisor level.

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.