Pass transaction source to validate_transaction (#5366)

* WiP

* Support source in the runtime API.

* Finish implementation in txpool.

* Fix warning.

* Fix tests.

* Apply suggestions from code review

Co-Authored-By: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-Authored-By: Nikolay Volf <nikvolf@gmail.com>

* Extra changes.

* Fix test and benches.

* fix test

* Fix test & benches again.

* Fix tests.

* Update bumpalo

* Fix doc test.

* Fix doctest.

* Fix doctest.

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>
Co-authored-by: Nikolay Volf <nikvolf@gmail.com>

substrate/client/transaction-pool/graph/src/validated_pool.rs

@@ -32,7 +32,7 @@ use parking_lot::{Mutex, RwLock};
 use sp_runtime::{
 	generic::BlockId,
 	traits::{self, SaturatedConversion},
-	transaction_validity::{TransactionTag as Tag, ValidTransaction},
+	transaction_validity::{TransactionTag as Tag, ValidTransaction, TransactionSource},
 };
 use sp_transaction_pool::{error, PoolStatus};
 use wasm_timer::Instant;
@@ -58,6 +58,7 @@ impl<Hash, Ex, Error> ValidatedTransaction<Hash, Ex, Error> {
 	pub fn valid_at(
 		at: u64,
 		hash: Hash,
+		source: TransactionSource,
 		data: Ex,
 		bytes: usize,
 		validity: ValidTransaction,
@@ -66,6 +67,7 @@ impl<Hash, Ex, Error> ValidatedTransaction<Hash, Ex, Error> {
 			data,
 			bytes,
 			hash,
+			source,
 			priority: validity.priority,
 			requires: validity.requires,
 			provides: validity.provides,