Metadata v14 (companion to #3336) (#564)

* Remove event pallet::metadata attributes

* Add scale-info deps, TypeInfo derives, update call variants

* Update metadata runtime APIs

* Add missing scale_info dependency, update rococo runtime API

* Add missing scale_info dependency

* Remove pushed diener patches

* Cargo.lock

* Add missing scale-info dependencies

* Fixes

* Statemint runtime fixes

* Call struct variant empty matches

* Add missing scale-info dependency

* Fixes

* scale-info 1.0

* cargo update -p xcm

* update lock

* Update Cargo.lock

* update to latest polkadot

* remove rpc_http_threads

https://github.com/paritytech/substrate/pull/9737

* replace task executor with tokio handler

https://github.com/paritytech/substrate/pull/9737

* fix test compilation?

* Update Cargo.lock

* cargo update

* remove unused

* Update substrate and polkadot

* Update test/client/src/lib.rs

Co-authored-by: Shawn Tabrizi <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>