* Remove the `Copy` bound on `AssetId`
* Also relax the `Copy` bound in the assets pallet
* Fix warnings on the newest nightly Rust
* Remove some unnecessary `clone()`s
* Try to satisfy clippy
* Remove some more unnecessary `clone()`s
* Add more `.clone()`s for newly merged code
* Also add `clone()`s in the benchmarks
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Co-authored-by: parity-processbot <>