Contracts add code_len to ContractsInfo (#14523)

* add code_len to v12

* fix

* Update frame/contracts/src/wasm/mod.rs

* fix

* fixes

* rm test

* add test back

* fix

* update test

* Fix comments

* fix build

* del

* fix clippy

* fix

* re-rename

substrate/frame/contracts/src/migration/v12.rs

@@ -80,6 +80,7 @@ pub struct CodeInfo<T: Config> {
 	#[codec(compact)]
 	refcount: u64,
 	determinism: Determinism,
+	code_len: u32,
 }
 
 #[storage_alias]
@@ -177,6 +178,7 @@ impl<T: Config> MigrationStep for Migration<T> {
 				owner: old_info.owner,
 				deposit,
 				refcount: old_info.refcount,
+				code_len: code_len as u32,
 			};
 
 			let amount = old_info.deposit.saturating_sub(info.deposit);
@@ -221,6 +223,7 @@ impl<T: Config> MigrationStep for Migration<T> {
 					deposit: v.deposit,
 					refcount: v.refcount,
 					owner: v.owner,
+					code_len: module.code.len() as u32,
 				};
 				(k, info)
 			})