transaction-pool: drop unpropagable txs if local node cant author blocks (#8048)

* transaction-pool: drop unpropagable txs if local node cant author blocks

* fix test compilation

* transaction-pool: remove unnecessary static bound on CanAuthor

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

* rpc-api: add translation for PoolError::Unactionable

* transaction-pool: add test for rejecting unactionable transactions

* basic-authorship: fix doc test

* transaction-pool: fix benchmark compilation

* transaction-pool: rename CanAuthor to IsValidator

* transaction-pool: nit in error message

Co-authored-by: Tomasz Drwięga <tomusdrw@users.noreply.github.com>

substrate/client/basic-authorship/src/basic_authorship.rs

@@ -408,6 +408,7 @@ mod tests {
 		let spawner = sp_core::testing::TaskExecutor::new();
 		let txpool = BasicPool::new_full(
 			Default::default(),
+			true.into(),
 			None,
 			spawner.clone(),
 			client.clone(),
@@ -466,6 +467,7 @@ mod tests {
 		let spawner = sp_core::testing::TaskExecutor::new();
 		let txpool = BasicPool::new_full(
 			Default::default(),
+			true.into(),
 			None,
 			spawner.clone(),
 			client.clone(),
@@ -506,6 +508,7 @@ mod tests {
 		let spawner = sp_core::testing::TaskExecutor::new();
 		let txpool = BasicPool::new_full(
 			Default::default(),
+			true.into(),
 			None,
 			spawner.clone(),
 			client.clone(),
@@ -573,6 +576,7 @@ mod tests {
 		let spawner = sp_core::testing::TaskExecutor::new();
 		let txpool = BasicPool::new_full(
 			Default::default(),
+			true.into(),
 			None,
 			spawner.clone(),
 			client.clone(),

substrate/client/basic-authorship/src/lib.rs

@@ -34,6 +34,7 @@
 //! # let spawner = sp_core::testing::TaskExecutor::new();
 //! # let txpool = BasicPool::new_full(
 //! #     Default::default(),
+//! #     true.into(),
 //! #     None,
 //! #     spawner.clone(),
 //! #     client.clone(),