Rework storage iterators (#13284)

* Rework storage iterators

* Make sure storage iteration is also accounted for when benchmarking

* Use `trie-db` from crates.io

* Appease clippy

* Bump `trie-bench` to 0.35.0

* Fix tests' compilation

* Update comment to clarify how `IterArgs::start_at` works

* Add extra tests

* Fix iterators on `Client` so that they behave as before

* Add extra `unwrap`s in tests

* More clippy fixes

* Come on clippy, give me a break already

* Rename `allow_missing` to `stop_on_incomplete_database`

* Add `#[inline]` to `with_recorder_and_cache`

* Use `with_recorder_and_cache` in `with_trie_db`; add doc comment

* Simplify code: use `with_trie_db` in `next_storage_key_from_root`

* Remove `expect`s in the benchmarking CLI

* Add extra doc comments

* Move `RawIter` before `TrieBackendEssence` (no code changes; just cut-paste)

* Remove a TODO in tests

* Update comment for `StorageIterator::was_complete`

* Update `trie-db` to 0.25.1

substrate/primitives/trie/src/recorder.rs

@@ -83,6 +83,7 @@ impl<H: Hasher> Recorder<H> {
 	///
 	/// - `storage_root`: The storage root of the trie for which accesses are recorded. This is
 	///   important when recording access to different tries at once (like top and child tries).
+	#[inline]
 	pub fn as_trie_recorder(
 		&self,
 		storage_root: H::Out,
@@ -147,7 +148,7 @@ struct TrieRecorder<H: Hasher, I> {
 impl<H: Hasher, I: DerefMut<Target = RecorderInner<H::Out>>> trie_db::TrieRecorder<H::Out>
 	for TrieRecorder<H, I>
 {
-	fn record<'b>(&mut self, access: TrieAccess<'b, H::Out>) {
+	fn record(&mut self, access: TrieAccess<H::Out>) {
 		let mut encoded_size_update = 0;
 
 		match access {