Add storage size component to weights (#12277)

* Add storage size component to weights

* Rename storage_size to proof_size

* Update primitives/weights/src/weight_v2.rs

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>

* Fixes

* cargo fmt

* Implement custom Decode and CompactAs

* Add missing import

* Fixes

* Remove CompactAs implementation

* Properly migrate from 1D weight

* Remove #[pallet::compact] from Weight parameters

* More #[pallet::compact] removals

* Add unit tests

* Set appropriate default block proof size

* cargo fmt

* Remove nonsensical weight constant

* Test only for the reference time weight in frame_system::limits

* Only check for reference time weight on idle

* Use destructuring syntax

* Update test expectations

* Fixes

* Fixes

* Fixes

* Correctly migrate from 1D weights

* cargo fmt

* Migrate using extra extrinsics instead of custom Decode

* Fixes

* Silence dispatch call warnings that were previously allowed

* Fix gas_left test

* Use OldWeight instead of u64

* Fixes

* Only check for reference time weight in election provider

* Fix test expectations

* Fix test expectations

* Use only reference time weight in grandpa test

* Use only reference time weight in examples test

* Use only reference time weight in examples test

* Fix test expectations

Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: Alexander Theißen <alex.theissen@me.com>

substrate/primitives/weights/src/lib.rs

@@ -30,7 +30,7 @@ extern crate self as sp_weights;
 
 mod weight_v2;
 
-use codec::{Decode, Encode};
+use codec::{CompactAs, Decode, Encode, MaxEncodedLen};
 use scale_info::TypeInfo;
 #[cfg(feature = "std")]
 use serde::{Deserialize, Serialize};
@@ -53,6 +53,25 @@ pub mod constants {
 	pub const WEIGHT_PER_NANOS: Weight = Weight::from_ref_time(1_000);
 }
 
+/// The old weight type.
+///
+/// NOTE: This type exists purely for compatibility purposes! Use [`weight_v2::Weight`] in all other
+/// cases.
+#[derive(
+	Decode,
+	Encode,
+	CompactAs,
+	PartialEq,
+	Eq,
+	Clone,
+	Copy,
+	RuntimeDebug,
+	Default,
+	MaxEncodedLen,
+	TypeInfo,
+)]
+pub struct OldWeight(pub u64);
+
 /// The weight of database operations that the runtime can invoke.
 ///
 /// NOTE: This is currently only measured in computational time, and will probably