Add a util method to recognize if resource in reconcile loop is being deleted

[grzesuav]

I noticed there is no common method so I see a lot of if xxx.,metadata.deletionTimestamp... logic, I thin it would be profitable to add utility method like isBeingDeleted(object) to determine that.

WDYT ?

[austince]

For me, it's still a one-liner to do obj.GetDeletionTimestamp().IsZero(), so this feels like overkill.

[jayunit100]

+1 bc I think complex controllers are increasingly coon and this would reduce cognitive load on outsiders trying to reason about a controllers logic

[FillZpp]

For me, it's still a one-liner to do obj.GetDeletionTimestamp().IsZero(), so this feels like overkill.

+1. And you can see this logic everywhere in the core k/k repo, I don't see anyone feels pain or wants to put it into a utility method.