Implement validation data refactor (#1585)

* update primitives

* correct parent_head field

* make hrmp field pub

* refactor validation data: runtime

* refactor validation data: messages

* add arguments to full_validation_data runtime API

* port runtime API

* mostly port over candidate validation

* remove some parameters from ValidationParams

* guide: update candidate validation

* update candidate outputs

* update ValidationOutputs in primitives

* port over candidate validation

* add a new test for no-transient behavior

* update util runtime API wrappers

* candidate backing

* fix missing imports

* change some fields of validation data around

* runtime API impl

* update candidate validation

* fix backing tests

* grumbles from review

* fix av-store tests

* fix some more crates

* fix provisioner tests

* fix availability distribution tests

* port collation-generation to new validation data

* fix overseer tests

* Update roadmap/implementers-guide/src/node/utility/candidate-validation.md

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>

polkadot/parachain/src/primitives.rs

@@ -28,6 +28,8 @@ use serde::{Serialize, Deserialize};
 #[cfg(feature = "std")]
 use sp_core::bytes;
 
+use polkadot_core_primitives::Hash;
+
 /// Block number type used by the relay chain.
 pub use polkadot_core_primitives::BlockNumber as RelayChainBlockNumber;
 
@@ -228,22 +230,16 @@ pub struct UpwardMessage {
 #[derive(PartialEq, Eq, Decode)]
 #[cfg_attr(feature = "std", derive(Debug, Encode))]
 pub struct ValidationParams {
-	/// The collation body.
-	pub block_data: BlockData,
 	/// Previous head-data.
 	pub parent_head: HeadData,
-	/// The maximum code size permitted, in bytes.
-	pub max_code_size: u32,
-	/// The maximum head-data size permitted, in bytes.
-	pub max_head_data_size: u32,
+	/// The collation body.
+	pub block_data: BlockData,
 	/// The current relay-chain block number.
-	pub relay_chain_height: polkadot_core_primitives::BlockNumber,
-	/// Whether a code upgrade is allowed or not, and at which height the upgrade
-	/// would be applied after, if so. The parachain logic should apply any upgrade
-	/// issued in this block after the first block
-	/// with `relay_chain_height` at least this value, if `Some`. if `None`, issue
-	/// no upgrade.
-	pub code_upgrade_allowed: Option<polkadot_core_primitives::BlockNumber>,
+	pub relay_chain_height: RelayChainBlockNumber,
+	/// The list of MQC heads for the inbound HRMP channels paired with the sender para ids. This
+	/// vector is sorted ascending by the para id and doesn't contain multiple entries with the same
+	/// sender.
+	pub hrmp_mqc_heads: Vec<(Id, Hash)>,
 }
 
 /// The result of parachain validation.