BugFix: Fix taskInstance API call fails if a task is removed from running DAG

[ephraimbuddy]

Closes: #14331

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[github-actions]

The PR most likely needs to run full matrix of tests because it modifies parts of the core of Airflow. However, committers might decide to merge it quickly and take the risk. If they don't merge it quickly - please rebase it to the latest master at your convenience, or amend the last commit of the PR, and push it with --force-with-lease.

[github-actions]

The Workflow run is cancelling this PR. It has some failed jobs matching ^Pylint$,^Static checks,^Build docs$,^Spell check docs$,^Backport packages$,^Provider packages,^Checks: Helm tests$,^Test OpenAPI*.

[github-actions]

The Workflow run is cancelling this PR. It has some failed jobs matching ^Pylint$,^Static checks,^Build docs$,^Spell check docs$,^Backport packages$,^Provider packages,^Checks: Helm tests$,^Test OpenAPI*.

[ephraimbuddy]

@ashb MySQL 8 job is failing and I can't find the reason

[ashb]

Yeah, not sure what happened there. Likely a timeout or some other glitch.

[ephraimbuddy]

Yeah, not sure what happened there. Likely a timeout or some other glitch.

Have pushed severally and MySQL 8 still failing. I can't pin what it is. 🙂