feat: reaping by POD_STATUS_PHASES - Pending, Running, Succeeded, Failed, Unknown

[Antvirf]

Enables the reaping of pods by the more familiar pod 'Status' logic (Pending, Running, Succeeded, Failed, Unknown), which in the underlying implementation is pod.Status.Phase. Built in a very similar way to the existing code used for pod.Status and should follow the repo's current conventions.

Please let me know if there's other things we need to adapt to make this work / any other required amendments. IMO the existing docs for POD_PHASES should be amended for clarity, I can add that to this PR if you'd like.

Ref #65

[brianberzins]

Want to say: this looks great.

I can't for the life of me remember why I used reason over pod.Status.Phase but I swear there was one.
It seems likely that reason is now defunct, so I'm honestly not going to worry about it.

Can you do me a favor and add an entry in the CHANGELOG.md with a new version number? This doesn't break anything, so minor version/second number should be sufficient. Then I'll get this merged and deployed for you!

[Antvirf]

Thanks @brianberzins , I've just pushed a commit bumping to 2.14.0.

[brianberzins]

Done! Sorry for slow response on the update.
Got lost in the github notification flood.

2.14.0 is released up on dockerhub.

https://hub.docker.com/layers/target/pod-reaper/2.14.0/images/sha256-940b80fa1660700a9e8e64aa8e27936d0805ddc8b5c80943d36261e17ff99b1e?context=explore

let me know how it works out for you!