Fix Crowdloan Dissolve and Add Auction Cancel (#2665)

* Check fund depositor calls dissolve

* add auction cancel too

* use drain api rather than `iter` + `take`

* add test and benchmarks

* cargo run --release --features=runtime-benchmarks -- benchmark --chain=westend-dev --steps=50 --repeat=20 --pallet=auctions --extrinsic=* --execution=wasm --wasm-execution=compiled --heap-pages=4096 --header=./file_header.txt --output=./runtime/westend/src/weights/

Co-authored-by: Parity Benchmarking Bot <admin@parity.io>