Introduce types to define 1:1 balance conversion for different relative
asset ids/locations of native asset.
Examples:
native asset on Asset Hub presented as `VersionedLocatableAsset` type in
the context of Relay Chain is
```
{
`location`: (0, Parachain(1000)),
`asset_id`: (1, Here),
}
```
and it's balance should be converted 1:1 by implementations of
`ConversionToAssetBalance` trait.
---------
Co-authored-by: Branislav Kontur <bkontur@gmail.com>
Muharem