remove retry from backers on failed candidate validation (#2182)

Hey guys, as discussed I've changed the name to a more general one
`PvfExecKind`, is this good or too general?
Creating this as a draft, I still have to fix the tests.

Closes #1585

Kusama address: FkB6QEo8VnV3oifugNj5NeVG3Mvq1zFbrUu4P5YwRoe5mQN

---------

Co-authored-by: command-bot <>
Co-authored-by: Marcin S <marcin@realemail.net>

polkadot/node/core/approval-voting/src/lib.rs

@@ -54,7 +54,7 @@ use polkadot_node_subsystem_util::{
 };
 use polkadot_primitives::{
 	ApprovalVote, BlockNumber, CandidateHash, CandidateIndex, CandidateReceipt, DisputeStatement,
-	ExecutorParams, GroupIndex, Hash, PvfExecTimeoutKind, SessionIndex, SessionInfo,
+	ExecutorParams, GroupIndex, Hash, PvfExecKind, SessionIndex, SessionInfo,
 	ValidDisputeStatementKind, ValidatorId, ValidatorIndex, ValidatorPair, ValidatorSignature,
 };
 use sc_keystore::LocalKeystore;
@@ -2867,7 +2867,7 @@ async fn launch_approval<Context>(
 				candidate_receipt: candidate.clone(),
 				pov: available_data.pov,
 				executor_params,
-				exec_timeout_kind: PvfExecTimeoutKind::Approval,
+				exec_kind: PvfExecKind::Approval,
 				response_sender: val_tx,
 			})
 			.await;

polkadot/node/core/approval-voting/src/tests.rs

@@ -2705,10 +2705,10 @@ async fn handle_double_assignment_import(
 	assert_matches!(
 		overseer_recv(virtual_overseer).await,
 		AllMessages::CandidateValidation(CandidateValidationMessage::ValidateFromExhaustive {
-			exec_timeout_kind,
+			exec_kind,
 			response_sender,
 			..
-		}) if exec_timeout_kind == PvfExecTimeoutKind::Approval => {
+		}) if exec_kind == PvfExecKind::Approval => {
 			response_sender.send(Ok(ValidationResult::Valid(Default::default(), Default::default())))
 				.unwrap();
 		}