Companion for substrate#9115 (#3265)

* runtime(kusama/polkadot): migrations for collective storage prefix

Signed-off-by: koushiro <[email protected]>

* fix

* fix migration

* spelling

* Fix

Signed-off-by: koushiro <[email protected]>

* Fix

Signed-off-by: koushiro <[email protected]>

* update Substrate

* fix unused

Co-authored-by: thiolliere <[email protected]>
Co-authored-by: Shawn Tabrizi <[email protected]>
Co-authored-by: parity-processbot <>