With the update of the Matter SDK wheels to 2024.7.1 (#809) the SDK
no longer auto-resubscribes when the read of the subscription fails
(see project-chip/connectedhomeip#34370).
The Server had a comment that it relies on mDNS rediscovery to
re-establish the subscription. But this is not always the case. This
change adds a retry mechanism to the subscription setup for a fixed
period of time after seeing it via mDNS.

Additionally, it avoids recreating the subscription if the liveness
timeout did not occur yet. This puts more trust into the SDK handling
the subscriptions.

Co-authored-by: Marcel van der Veldt <[email protected]>

Use a task in all cases when we (re-)setup the node. Use the task to
also make sure that only a single setup is running at a time. And
finally it allows us to abort any currently running setup task at the
end.

We'll have to implement retry on our end, so use this as the new normal
naming.