KEP-4818keps/sig-node/4818-allow-zero-value-for-sleep-action-of-prestop-hook

Allow zero value for Sleep Action of PreStop Hook

The sleep action for the PreStop container lifecycle hook was introduced in KEP 3960. It however doesn’t accept zero as a valid value for the sleep duration seconds. This KEP aims to add support for setting a value of zero with the sleep action of the PreStop hook.