Improve state related logs to use a more uniform format (#9452)

* Improve `state` related logs to use a more uniform format

The logging before wasn't that uniform and not that great to read/parse.
Now we are using a uniform format for all the logs. Besides these
changes, there are some minor changes around the code that calls the
state machine.

* Make CI happy

* Use HexDisplay for `ext_id`

substrate/client/light/src/lib.rs

@@ -37,7 +37,7 @@ pub fn new_fetch_checker<E, B: BlockT, S: BlockchainStorage<B>>(
 	blockchain: Arc<Blockchain<S>>,
 	executor: E,
 	spawn_handle: Box<dyn SpawnNamed>,
-) -> LightDataChecker<E, HashFor<B>, B, S>
+) -> LightDataChecker<E, B, S>
 where
 	E: CodeExecutor,
 {