try-runtime: add cli option --export-proof (#12539)

* try-runtime: add cli option --export-proof

* extract proof in raw json format

* fix build

* fix(try-runtime execute-block): wrong block parsing

* fmt

* apply suggestions

* Update utils/frame/try-runtime/cli/src/lib.rs

Co-authored-by: Anton <anton.kalyaev@gmail.com>

* Update utils/frame/try-runtime/cli/src/lib.rs

Co-authored-by: Anton <anton.kalyaev@gmail.com>

* Update utils/frame/try-runtime/cli/src/lib.rs

Co-authored-by: Anton <anton.kalyaev@gmail.com>

* Update utils/frame/try-runtime/cli/src/lib.rs

Co-authored-by: Anton <anton.kalyaev@gmail.com>

* split off external dependencies

* fmt

* fix try-runtime compilation

Co-authored-by: Anton <anton.kalyaev@gmail.com>

substrate/utils/frame/try-runtime/cli/src/commands/execute_block.rs

@@ -134,6 +134,7 @@ where
 		"TryRuntime_execute_block",
 		&payload,
 		full_extensions(),
+		shared.export_proof,
 	)?;
 
 	Ok(())

substrate/utils/frame/try-runtime/cli/src/commands/follow_chain.rs

@@ -150,6 +150,10 @@ where
 			"TryRuntime_execute_block",
 			(block, command.state_root_check, command.try_state.clone()).encode().as_ref(),
 			full_extensions(),
+			shared
+				.export_proof
+				.as_ref()
+				.map(|path| path.as_path().join(&format!("{}.json", number))),
 		);
 
 		if let Err(why) = result {

substrate/utils/frame/try-runtime/cli/src/commands/on_runtime_upgrade.rs

@@ -59,6 +59,7 @@ where
 		"TryRuntime_on_runtime_upgrade",
 		command.checks.encode().as_ref(),
 		Default::default(), // we don't really need any extensions here.
+		shared.export_proof,
 	)?;
 
 	let (weight, total_weight) = <(Weight, Weight) as Decode>::decode(&mut &*encoded_result)