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>