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/node/core/av-store/src/lib.rs

@@ -34,7 +34,7 @@ use polkadot_node_subsystem_util::database::{DBTransaction, Database};
 use bitvec::{order::Lsb0 as BitOrderLsb0, vec::BitVec};
 use polkadot_node_primitives::{AvailableData, ErasureChunk};
 use polkadot_node_subsystem_util as util;
-use polkadot_primitives::v1::{
+use polkadot_primitives::v2::{
 	BlockNumber, CandidateEvent, CandidateHash, CandidateReceipt, Hash, Header, ValidatorIndex,
 };
 use polkadot_subsystem::{

polkadot/node/core/av-store/src/tests.rs

@@ -26,7 +26,7 @@ use parking_lot::Mutex;
 use polkadot_node_primitives::{AvailableData, BlockData, PoV, Proof};
 use polkadot_node_subsystem_test_helpers as test_helpers;
 use polkadot_node_subsystem_util::{database::Database, TimeoutExt};
-use polkadot_primitives::v1::{
+use polkadot_primitives::v2::{
 	CandidateHash, CandidateReceipt, CoreIndex, GroupIndex, HeadData, Header,
 	PersistedValidationData, ValidatorId,
 };