Add migrations from pallet_asset to statemine, statemint and westmint (#1742)

* statemine: migrate pallet assets to v1

* statemint and westmint: migrate pallet assets to v1

* remove items limit

* update dependencies and crate imports

* change substrate version to dependent PR

* revert to master

* revert changes to cargo toml

* fix weights to test compilation with companion substrate branch

* change destroy etrinsic in westmint to new extrinsics

* update lockfile for {"polkadot", "substrate"}

* rebase

Co-authored-by: parity-processbot <>