* upper bound witness with refund

* simple test

* track approvals

* dont allow approvals when asset is frozen

* destroy returns approval deposit

* update `NonTransfer` proxies

* cargo run --release --features=runtime-benchmarks --manifest-path=bin/node/cli/Cargo.toml -- benchmark --chain=dev --steps=50 --repeat=20 --pallet=pallet_assets --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --output=./frame/assets/src/weights.rs --template=./.maintain/frame-weight-template.hbs

Co-authored-by: Parity Bot <[email protected]>