Improve try-state developer experience & fix bug (#2019)

Making some devex improvements as I audit our chains adherence to
try-state invariants, in preparation for automated try-state checks and
alerting.

Note to reviewer: while you're here, if you have time would be great to
get your eyes on https://github.com/paritytech/polkadot-sdk/pull/1297
also since it touches a similar file and I'd like to avoid merge
conflicts :P

## Devex Improvements

- Changes the log level of logs informing the user that try-state checks
are being run for a pallet from debug to info
- Improves how errors are communicated
- Errors are logged when they are encountered, rather than after
everything has been executed
- Exact pallet the error originated from is included with the error log
  - Clearly see all errors and how many there are, rather than only one
  - Closes #136 

### Example of new logs

<img width="1185" alt="Screenshot 2023-10-25 at 15 44 44"
src="https://github.com/paritytech/polkadot-sdk/assets/16665596/b75588a2-1c64-45df-bbc8-bcb8bf8b0fe0">

### Same but with old logs (run with RUST_LOG=debug)

Notice only informed of one of the errors, and it's unclear which pallet
it originated

<img width="1185" alt="Screenshot 2023-10-25 at 15 39 01"
src="https://github.com/paritytech/polkadot-sdk/assets/16665596/e3429cb1-489e-430a-9716-77c052e5dae6">
 

## Bug fix

When dry-running migrations and `checks.try_state()` is `true`, only run
`try_state` checks after migrations have been executed. Otherwise,
`try_state` checks that expect state to be in at a HIGHER storage
version than is on-chain could incorrectly fail.

---------

Co-authored-by: command-bot <>

substrate/frame/support/src/traits/try_runtime.rs

@@ -144,9 +144,27 @@ impl<BlockNumber: Clone + sp_std::fmt::Debug + AtLeast32BitUnsigned> TryState<Bl
 		match targets {
 			Select::None => Ok(()),
 			Select::All => {
-				let mut result = Ok(());
-				for_tuples!( #( result = result.and(Tuple::try_state(n.clone(), targets.clone())); )* );
-				result
+				let mut error_count = 0;
+				for_tuples!(#(
+					if let Err(_) = Tuple::try_state(n.clone(), targets.clone()) {
+						error_count += 1;
+					}
+				)*);
+
+				if error_count > 0 {
+					log::error!(
+						target: "try-runtime",
+						"{} pallets exited with errors while executing try_state checks.",
+						error_count
+					);
+
+					return Err(
+						"Detected errors while executing try_state checks. See logs for more info."
+							.into(),
+					)
+				}
+
+				Ok(())
 			},
 			Select::RoundRobin(len) => {
 				let functions: &[fn(BlockNumber, Select) -> Result<(), TryRuntimeError>] =