Fix race conditions in the handling of notifications in events

[tomaka]

Fix #2740

The logic of the handling of NotificationsInOpenCancel events wasn't correct, as it wasn't taking into account the fact that everything is asynchronous.

[mergify]

Automatically approving tomaka's pull requests. This auto-approval will be removed once more maintainers are active.

[github-actions]

twiggy diff report

Difference in .wasm size before and after this pull request.

---

 Delta Bytes │ Item
─────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
        +529 ┊ alloc::collections::vec_deque::VecDeque<T,A>::remove::h64cb8873c5d0d31a
        +431 ┊ <alloc::collections::vec_deque::iter::Iter<T> as core::iter::traits::iterator::Iterator>::try_fold::h49d6da2e3ec09952
        +431 ┊ <alloc::collections::vec_deque::iter::Iter<T> as core::iter::traits::iterator::Iterator>::try_fold::h6165b42d6c2eb640
        +431 ┊ <alloc::collections::vec_deque::iter::Iter<T> as core::iter::traits::iterator::Iterator>::try_fold::ha73816f888478ff2
        +431 ┊ <alloc::collections::vec_deque::iter::Iter<T> as core::iter::traits::iterator::Iterator>::try_fold::hcd89ea5ca47d0b4d
        +238 ┊ smoldot::libp2p::collection::multi_stream::MultiStreamConnectionTask<TNow,TSubId>::inject_coordinator_message::hd0b380dc39946f9b
        +232 ┊ smoldot::libp2p::collection::single_stream::SingleStreamConnectionTask<TNow>::inject_coordinator_message::h73be97498bd58f97
        +225 ┊ alloc::collections::vec_deque::ring_slices::RingSlices::ring_slices::h235a162b4f5016ba
        +207 ┊ smoldot::libp2p::collection::single_stream::SingleStreamConnectionTask<TNow>::read_write::hdd1e9738be45c96f
        +202 ┊ alloc::raw_vec::RawVec<T,A>::grow_exact::h2350a0a37796c9f8
        +190 ┊ alloc::collections::vec_deque::VecDeque<T,A>::grow::h3c1dbef57f5fbb20
        +181 ┊ alloc::raw_vec::RawVec<T,A>::allocate_in::h999a7bd428ffe01d
        +153 ┊ alloc::collections::vec_deque::VecDeque<T,A>::with_capacity_in::h4b6192ee4a9898dd
        +144 ┊ core::iter::traits::iterator::Iterator::try_fold::h12c43889f2c5f49c
        +144 ┊ core::iter::traits::iterator::Iterator::try_fold::h1a738d31696391f2
        +144 ┊ core::iter::traits::iterator::Iterator::try_fold::h50bcb3f2963322bc
        +144 ┊ core::iter::traits::iterator::Iterator::try_fold::h9930791007ccfc4a
        +128 ┊ core::ptr::drop_in_place<smoldot::libp2p::collection::multi_stream::MultiStreamConnectionTaskInner<smoldot_light_wasm::Instant,usize>>::h13f2d4abdde67d43
        +127 ┊ core::ptr::drop_in_place<smoldot::libp2p::collection::single_stream::SingleStreamConnectionTaskInner<smoldot_light_wasm::Instant>>::h889741b3e313729b
        -116 ┊ core::ptr::drop_in_place<smoldot::libp2p::collection::multi_stream::MultiStreamConnectionTaskInner<smoldot_light_wasm::Instant,usize>>::hee91e08202f36002
       +1201 ┊ ... and 30 more.
       +9498 ┊ Σ [50 Total Rows]

[melekes]

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