Finish migration to v2 primitives (#5037)

* remove v0 primitives from polkadot-primitives

* first pass: remove v0

* fix fallout in erasure-coding

* remove v1 primitives, consolidate to v2

* the great import update

* update runtime_api_impl_v1 to v2 as well

* guide: add `Version` request for runtime API

* add version query to runtime API

* reintroduce OldV1SessionInfo in a limited way

polkadot/parachain/test-parachains/undying/collator/src/lib.rs

@@ -23,7 +23,7 @@ use polkadot_node_primitives::{
 	maybe_compress_pov, Collation, CollationResult, CollationSecondedSignal, CollatorFn,
 	MaybeCompressedPoV, PoV, Statement,
 };
-use polkadot_primitives::v1::{CollatorId, CollatorPair, Hash};
+use polkadot_primitives::v2::{CollatorId, CollatorPair, Hash};
 use sp_core::{traits::SpawnNamed, Pair};
 use std::{
 	collections::HashMap,
@@ -329,7 +329,7 @@ mod tests {
 
 	use futures::executor::block_on;
 	use polkadot_parachain::primitives::{ValidationParams, ValidationResult};
-	use polkadot_primitives::v1::{Hash, PersistedValidationData};
+	use polkadot_primitives::v2::{Hash, PersistedValidationData};
 
 	#[test]
 	fn collator_works() {

polkadot/parachain/test-parachains/undying/collator/src/main.rs

@@ -19,7 +19,7 @@
 use polkadot_cli::{Error, Result};
 use polkadot_node_primitives::CollationGenerationConfig;
 use polkadot_node_subsystem::messages::{CollationGenerationMessage, CollatorProtocolMessage};
-use polkadot_primitives::v1::Id as ParaId;
+use polkadot_primitives::v2::Id as ParaId;
 use sc_cli::{Error as SubstrateCliError, Role, SubstrateCli};
 use sp_core::hexdisplay::HexDisplay;
 use test_parachain_undying_collator::Collator;