[To dev/1.3] Subscription: fix consumer infinite pulling event & fully managed tsfile parsing process & increase the reference count for subscribed parsed raw tablet event & disrupt parsing requests through the introduction of randomness & disable prefetch by default (#14856)

[To dev/1.3] Subscription: fix consumer infinite pulling event & fully managed tsfile parsing process & increase the reference count for subscribed parsed raw tablet event & disrupt parsing requests through the introduction of randomness & disable prefetch by default (#14856) #38821