Add lifecycle hooks to KubernetesTaskRunner

[georgew5656]

The KubernetesTaskRunner doesn't actually register itself to be managed by @lifecycle, and nothing ever manually calls start() on it, so the cleanup job thats supposed to get started in start() never runs.

Description

Add annotations to manage the KubernetesTaskRunner with LIfecycle.

Tested this in my local cluster by making sure a job was actually cleaned up

Release note

Bugfix to druid-kubernetes-overlord-extensions

Key changed/added classes in this PR

• KubernetesTaskRunner

This PR has:

• been self-reviewed.
  • using the concurrency checklist (Remove this item if the PR doesn't have any relation to concurrency.)
• added documentation for new or modified features or behaviors.
• a release note entry in the PR description.
• added Javadocs for most classes and all non-trivial methods. Linked related entities via Javadoc links.
• added or updated version, license, or notice information in licenses.yaml
• added comments explaining the "why" and the intent of the code wherever would not be obvious for an unfamiliar reader.
• added unit tests or modified existing tests to cover new code paths, ensuring the threshold for code coverage is met.
• added integration tests.
• been tested in a test Druid cluster.

[YongGang]

LGTM

[suneet-s]

Good catch!