fix(trie): parallel proof should return empty storage proofs

[shekhirin]

Same behavior as in non-parallel proof implementation

reth/crates/trie/trie/src/proof/mod.rs

Lines 122 to 125 in 1602bae

	// Initialize all storage multiproofs as empty.
	// Storage multiproofs for non empty tries will be overwritten if necessary.
	let mut storages: B256HashMap<_> =
	targets.keys().map(|key| (*key, StorageMultiProof::empty())).collect();

[rkrasiuk]

good find, was not backported