replicate sp_state_machine::TrieBackend

[timwu20]

Issue summary

• Patricia trie-based backend. Transaction type is an overlay of changes to commit.
• Creates ephemeral DBs which load deltas into memory on top of persisted trie nodes and supplies to TrieDb to calculate storage roots
• Returns commit sets to be applied to DB

Other information and links

• https://github.com/paritytech/polkadot-sdk/blob/1bc08858292b88b6c834fbc9f72d61e692363e4a/substrate/primitives/state-machine/src/trie_backend.rs#L316