change grandpa name and use fork_id

[melekes]

Closes #1955

[github-actions]

twiggy diff report

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

---

 Delta Bytes │ Item
─────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
      +12078 ┊ smoldot::network::service::ChainNetwork<TNow>::next_event::{{closure}}::h877dd552964b598a
      -12074 ┊ smoldot::network::service::ChainNetwork<TNow>::next_event::{{closure}}::he4aaa26d26cbbfb2
       +3317 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::ha64375b3b3c4e14d
       -3002 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h41591dc67185c0e1
       +2708 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h114db7f02d9b915c
       -2708 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h7565515636f3a322
       +1112 ┊ core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once::h19328b813cd574c4
       -1112 ┊ core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once::h7ac93205b1c5e81b
       -1040 ┊ core::ptr::drop_in_place<futures_util::future::future::remote_handle::Remote<core::future::from_generator::GenFuture<smoldot_light_base::Client<alloc::vec::Vec<futures_util::abortable::AbortHandle>,smoldot_light_wasm::platform::Platform>::add_chain<alloc::vec::into_iter::IntoIter<smoldot_light_base::ChainId>>::{{closure}}>>>::h01436fb15d4efab8
       +1040 ┊ core::ptr::drop_in_place<futures_util::future::future::remote_handle::Remote<core::future::from_generator::GenFuture<smoldot_light_base::Client<alloc::vec::Vec<futures_util::abortable::AbortHandle>,smoldot_light_wasm::platform::Platform>::add_chain<alloc::vec::into_iter::IntoIter<smoldot_light_base::ChainId>>::{{closure}}>>>::h878f88dfc1039b0e
        +962 ┊ core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once::h98a38bc4aaaaaffa
        -796 ┊ core::ptr::drop_in_place<core::future::from_generator::GenFuture<smoldot::network::service::ChainNetwork<smoldot_light_wasm::Instant>::next_event::{{closure}}>>::h57f9d84e5b0c0ec0
        +796 ┊ core::ptr::drop_in_place<core::future::from_generator::GenFuture<smoldot::network::service::ChainNetwork<smoldot_light_wasm::Instant>::next_event::{{closure}}>>::hf98df8adc2d3976e
        -769 ┊ <core::iter::adapters::chain::Chain<A,B> as core::iter::traits::iterator::Iterator>::next::h991f5942f368cb69
        +769 ┊ <core::iter::adapters::chain::Chain<A,B> as core::iter::traits::iterator::Iterator>::next::hb65289f858700a07
        +711 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h32e8a3e723313dc3
        -711 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h5d4096b660bf0047
        -662 ┊ core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &mut F>::call_once::h3095cc94be7e23cf
        +417 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h298540077a92bd74
        -417 ┊ <core::future::from_generator::GenFuture<T> as core::future::future::Future>::poll::h3fafaffd2b1e08d9
        +782 ┊ ... and 210 more.
       +1646 ┊ Σ [230 Total Rows]

[tomaka]

The PR looks good, but because of paritytech/substrate#10969 we might have to wait for another version of Polkadot to be deployed 😬

[tomaka]

(needs a CHANGELOG update too)

[tomaka]

Polkadot v0.9.18 has just been released, but let's wait a week or two for everyone to upgrade.

[tomaka]

This can go in, but preferably after #2264.