contracts: Multi block migrations (#14045)

* Frame Add translate_next

This works similarly to to `translate` but only translate a single entry.
This function will be useful in the context of multi-block migration.

* Move to lazy migration

* Updates

* simplify MockMigration

* wip

* wip

* add bench

* add bench

* fmt

* fix bench

* add .

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_contracts

* Apply suggestions from code review

Co-authored-by: Alexander Theißen <alex.theissen@me.com>

* Scalfold v10 / v11 fix tests

* PR comment

* tweak pub use

* wip

* wip

* wip

* misc merge master

* misc merge master

* wip

* rm tmp stuff

* wip

* wip

* wip

* wip

* wip

* fixes

* add state

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* fix

* fixed compilation

* clean up logs

* wip

* Revert "Frame Add translate_next"

This reverts commit 10318fc95c42b1f7f25efeb35e6d947ea02bed88.

* Fix v10 logic

* Apply suggestions from code review

Co-authored-by: Alexander Theißen <alex.theissen@me.com>

* wip

* fixes

* exercise del_queue

* bump sample size

* fmt

* wip

* blank line

* fix lint

* fix rustdoc job lint

* PR comment do not use dangerous into()

* Ad macros for updating mod visibility

* Add doc

* Add max_weight to integrity_test

* fix compilation

* Add no migration tests

* ".git/.scripts/commands/bench/bench.sh" pallet dev pallet_contracts

* fix clippy

* PR review

* Update frame/contracts/src/lib.rs

Co-authored-by: Sasha Gryaznov <hi@agryaznov.com>

* Fix master merge

* fix merge 2

* fix tryruntime

* fix lint

---------

Co-authored-by: Alexander Theißen <alex.theissen@me.com>
Co-authored-by: command-bot <>
Co-authored-by: Sasha Gryaznov <hi@agryaznov.com>

substrate/frame/contracts/primitives/src/lib.rs

@@ -105,6 +105,8 @@ pub enum ContractAccessError {
 	DoesntExist,
 	/// Storage key cannot be decoded from the provided input data.
 	KeyDecodingFailed,
+	/// Storage is migrating. Try again later.
+	MigrationInProgress,
 }
 
 bitflags! {