Add on_kill method to KubernetesPodOperator

[krisdock]

Description

Kubernetes Pods that are created by KubernetesPodOperator aren't deleted when a running task is killed/cleared from the Airflow UI. There's a known function (on_kill) that can be implemented to properly handle this scenario.

Use case / motivation

If a running Airflow task is killed, the associated Kubernetes Pod should ideally be deleted.

Related Issues

None

[boring-cyborg]

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[krisdock]

@dimberman

[paolaperaza]

Thanks for submitting this, @krisdock! @dimberman Looks like you submitted a PR for this and it was merged a few days ago: #10666

Want to close out this GH issue and add the 1.10.13 milestone to this?

Related followup PR:

• Make grace_period_seconds option on K8sPodOperator #10727

[dimberman]

Issue has been addressed and merged