Fix deadline serialization, repr, and prune edge cases - #70421

Fix deadline serialization, repr, and prune edge cases#70421

o-nikolas merged 8 commits into

apache:mainapache/airflow:mainfrom

aws-mwaa:feature/deadline-robustness-followupaws-mwaa/upstream-to-airflow:feature/deadline-robustness-followupCopy head branch name to clipboard