XCM Benchmarks for Asset Transactor w/ Fungible Asset (#3818)

* benchmarks for fungibles

* add benchmark to westend

* fix hex

* clean up a bit

* update code doc

* fix warnings

* cargo run --quiet --release --features runtime-benchmarks -- benchmark --chain=westend-dev --pallet=pallet_xcm_benchmarks::fungible --extrinsic=* --steps=10 --repeat=10 --template=./xcm/pallet-xcm-benchmarks/template.hbs --output=./ --execution=wasm --wasm-execution=compiled

* use skip

* fix spelling

* Update Cargo.lock

* add scale-info

* Update Cargo.lock

* update bench

* cargo run --quiet --release --features=runtime-benchmarks -- benchmark --chain=westend-dev --steps=50 --repeat=20 --pallet=pallet_xcm_benchmarks::fungible --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --template=./xcm/pallet-xcm-benchmarks/template.hbs --output=./runtime/westend/src/weights/xcm/pallet_xcm_benchmarks_fungible.rs

* weights compile

* update westend to use weights

* fmt

* spelling fixes

* Delete pallet_xcm_benchmarks::fungible.rs

* Apply suggestions from code review

Co-authored-by: Kian Paimani <[email protected]>

* fix code review

* update weight

* fix report_error

* fix spell check

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