fix: Shared must relinquish control to the executor if repolled #2136
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If the wrapped future requires that another future runs before it stops
waking itself while returning pending the current Shared will loop
forever. This removes the
REPOLL
case and returns pending immediately,since the current task is recorded and therefore woken through
Notifier
'swake_by_ref
theShared
future will still be polledagain
Fixes #2130