Refactor chain information building process

[tomaka]

Close #1681

Right now the code of warp_sync and chain_spec both build a ChainInformation struct by making runtime calls. However the code of these two modules is completely different.
Because these two modules were built very early on in smoldot's history, they are getting help from the sub-modules of the chain_information module, that are also very old.

This PR modernizes all of this: it removes all the sub-modules under chain_information and merges them into one that does everything.

This new module is now used by warp_sync and chain_spec, and warp_sync and chain_spec are now more simple.

I'm also planning to use this new module in order to refactor the SQLite database. (#1752)

This PR slightly changes the behavior of the warp syncing: we now download the runtime, then build it, and then only download the call proofs to obtain the chain information. Right now all the downloads are done in parallel.
This change is in principle more correct. At the moment we blindly call functions that we expect to exist. By downloading and building the runtime first, we can check the list of supported functions and then only call them. (cc #949) This is really not a problem at the moment because none of the functions that we use has ever been deprecated, but it could have become one in the future.

[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
─────────────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
      -10322 ┊ smoldot::sync::warp_sync::BuildChainInformation<TSrc,TRq>::build::he61ca04fc10e4555
       +3296 ┊ smoldot::chain::chain_information::build::ChainInformationBuild::from_call_in_progress::h80fd8abe92e9f4ac
       +3066 ┊ smoldot::chain::chain_information::build::ChainInformationBuild::start_next_call::hcaa2c8a5af5e999c
       -3036 ┊ smoldot::chain_spec::ChainSpec::as_chain_information::h07957c875368d6f9
       -2853 ┊ smoldot::chain::chain_information::aura_config::AuraConfiguration::from_virtual_machine_prototype::hf15ae4b3fb10d9f5
       +2268 ┊ smoldot::sync::warp_sync::BuildRuntime<TSrc,TRq>::build::hdc38f1e66524d73c
       -1861 ┊ smoldot::sync::warp_sync::InProgressWarpSync<TSrc,TRq>::desired_requests::he0b77142ab276a9b
       +1860 ┊ smoldot::sync::warp_sync::BuildChainInformation<TSrc,TRq>::build::hbb771548d218dd34
       +1713 ┊ smoldot::chain_spec::ChainSpec::as_chain_information::h89259a83797982b5
       -1628 ┊ smoldot::chain::chain_information::grandpa_genesis_config::GrandpaGenesisConfiguration::from_virtual_machine_prototype::h8654dcc21d1e9720
       -1436 ┊ smoldot::chain::chain_information::babe_genesis_config::BabeGenesisConfiguration::from_virtual_machine_prototype::hd9cfe6e003bc0488
       -1345 ┊ smoldot::trie::proof_verify::trie_node_info::h2a9a4f89ae8e1379
       -1345 ┊ smoldot::trie::proof_verify::trie_node_info::ha6de2c08de238f34
       -1345 ┊ smoldot::trie::proof_verify::trie_node_info::hc2f512b7d0f38ef9
       +1345 ┊ smoldot::trie::proof_verify::trie_node_info::hcc567a8e2a88636f
       -1345 ┊ smoldot::trie::proof_verify::trie_node_info::hee90874ad6270f95
       +1146 ┊ <(FnA,FnB,FnC,FnD,FnE,FnF,FnG,FnH) as nom::sequence::Tuple<Input,(A,B,C,D,E,F,G,H),Error>>::parse::h57faf9f4046b06b6
       -1146 ┊ <(FnA,FnB,FnC,FnD,FnE,FnF,FnG,FnH) as nom::sequence::Tuple<Input,(A,B,C,D,E,F,G,H),Error>>::parse::hf450576f9267d436
       -1013 ┊ <(FnA,FnB,FnC,FnD,FnE,FnF,FnG) as nom::sequence::Tuple<Input,(A,B,C,D,E,F,G),Error>>::parse::hb4d7587b5a2e2b3c
       +1013 ┊ <(FnA,FnB,FnC,FnD,FnE,FnF,FnG) as nom::sequence::Tuple<Input,(A,B,C,D,E,F,G),Error>>::parse::hd4a81237ead2d0ea
       -4473 ┊ ... and 274 more.
      -24829 ┊ Σ [294 Total Rows]

[melekes]

👍