Benchmark Polkadot Claims Pallet (#876)

* fix

* Starting to add benchmarks

* make compile

* add benchmarks

* Make work with Substrate master

* Bench validate unsigned

* back to polkadot master

* starting to add cli with feature flag

* more stuff

* Add to kusama

* Update Cargo.lock

* fix dev dep

* bump wasm builder

* Remove encode from keccak benchmark

* bump spec

* Add weight documentation

* Update Cargo.lock

* Update check_runtime.sh

* Update publish_draft_release.sh

* Update Cargo.lock

Co-authored-by: thiolliere <gui.thiolliere@gmail.com>