Add a new host function for reporting fatal errors; make WASM backtraces readable when printing out errors (#10741)

* Add a new host function for reporting fatal errors

* Fix one of the wasmtime executor tests

* Have `#[runtime_interface(wasm_only)]` actually mean WASM-only, and not no_std-only

* Print out errors through `Display` instead of `Debug`

* Switch one more trait to require `Error` for its error instead of only `Debug`

* Align to review comments

substrate/primitives/runtime/src/traits.rs

@@ -1585,7 +1585,7 @@ impl Printable for Tuple {
 #[cfg(feature = "std")]
 pub trait BlockIdTo<Block: self::Block> {
 	/// The error type that will be returned by the functions.
-	type Error: std::fmt::Debug;
+	type Error: std::error::Error;
 
 	/// Convert the given `block_id` to the corresponding block hash.
 	fn to_hash(