async_context_release_lock() function

the async_context lock may be called in a nested fashion, so an internal count is maintained. On the outermost release, When the outermost lock is released, a check is made for work which might have been skipped while the lock was held, and any such work may be performed during this call IF the call is made from the same core that the async_context belongs to. for async_contexts that provide locking (not async_context_poll), this method is threadsafe. and may be called from within any worker method called by the async_context or from any other non-IRQ context.