Currently, timeouts are only accessible if a kubeadm runtime.Object{}
like InitConfiguration is passed around.
Any time a config is loaded or defaulted, store the Timeouts
structure in a thread-safe way in the main kubeadm API package
with SetActiveTimeouts(). Optionally, a deep-copy can be
performed before calling SetActiveTimeouts(). Make this struct
accessible with GetActiveTimeouts(). Ensure these functions
are thread safe.
On init() make sure the struct is defaulted, so that unit
tests can work with these values.
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