starknet_committer: create storage tries concurrently based on wether storage is gatherable

[nimrod-starkware]

Note

Medium Risk
Introduces a new concurrent code path for reading storage tries, which can change execution order and stress underlying storage/task gathering behavior despite aiming to preserve results.

Overview
Storage trie reading can now run concurrently when the provided storage implements GatherableStorage (via Storage::as_gatherable_storage()), falling back to the existing sequential path otherwise.

To support this, read_forest/create_storage_tries switch from ReadOnlyStorage to Storage and add stricter Send/Sync/'static bounds on Layout::NodeLayout (and IndexDb’s hasher), enabling the new task-based concurrent traversal implementation.

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[reviewable-StarkWare]

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[nimrod-starkware]

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• starknet_committer: create storage tries concurrently based on wether storage is gatherable #13634 👈 (View in Graphite)
• starknet_patricia_storage: add as_gatherable_storage to storage trait #13633
• starknet_committer: create storage tries concurrently #13632
• starknet_patricia_storage: cache reads with gatherable storage #13631
• starknet_patricia_storage: define gatherable storage trait #13630
• starknet_patricia_storage: define storage task trait #13629
• starknet_committer: util for single storage trie creation #13358 : 1 other dependent PR (#13359 )
• starknet_committer: create sotrage tries sequentially #12166 : 1 other dependent PR (#12167 )
• starknet_patricia_storage: remove code dup for mget #12175 : 1 other dependent PR (#12201 )
• starknet_patricia_storage: spawn a task or not based on config #12174
• starknet_patricia_storage: add config field to rocksDB storage #12173
• starknet_patricia_storage: add config field to rocksDB #12172
• starknet_patricia_storage: spawn blocking tasks for rocksDB reads #12168 : 1 other dependent PR (#12169 )
• starknet_patricia_storage: always cache writes in cached storage #12443 : 2 other dependent PRs (#12444 , #13357 )
• starknet_patricia_storage: define reads collector storage #13240 : 1 other dependent PR (#13354 )
• starknet_patricia_storage: immutable read for cached storage #13237 : 1 other dependent PR (#13238 )
• starknet_patricia_storage: atomic counters for read stats #12122 : 1 other dependent PR (#12251 )
• starknet_patricia_storage: introduce immutable read only storage #13236
• starknet_committer: use read only storage if possible #13235
• starknet_patricia_storage: rename mutable getters #13379
• starknet_patricia_storage: split storage trait #13234
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