[xcm-emulator] Decouple the `AccountId` type from `AccountId32` (#1458)
Closes: #1381
Originally from: https://github.com/paritytech/cumulus/pull/3037
---------
Co-authored-by: 
joe petrowski <[email protected]>
Closes: #1381
Originally from: https://github.com/paritytech/cumulus/pull/3037
---------
Co-authored-by: joe petrowski <[email protected]>