Remove Polkadot & Kusama native runtime (#1304)

This pull request removes the Polkadot and Kusama native runtime from
the polkadot node. This brings some implications with it:

There are no more kusama/polkadot-dev chain specs available. We will
need to write some tooling in the fellowship repo to provide them
easily.

The try-runtime job for polkadot & kusama is not available anymore as we
don't have the dev chain specs anymore.

Certain benchmarking commands will also not work until we migrate them
to use a runtime api.

Some crates in utils are still depending on the polkadot/kusama native
runtime that will also need to be fixed.

Port of: https://github.com/paritytech/polkadot/pull/7467

polkadot/node/test/service/Cargo.toml

@@ -11,6 +11,7 @@ futures = "0.3.21"
 hex = "0.4.3"
 gum = { package = "tracing-gum", path = "../../gum" }
 rand = "0.8.5"
+serde_json = "1.0.106"
 tempfile = "3.2.0"
 tokio = "1.24.2"