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

Cargo.lock

@@ -12779,7 +12779,6 @@ dependencies = [
  "futures",
  "hex-literal",
  "is_executable",
- "kusama-runtime-constants",
  "kvdb",
  "kvdb-rocksdb",
  "log",
@@ -12825,9 +12824,6 @@ dependencies = [
  "polkadot-parachain-primitives",
  "polkadot-primitives",
  "polkadot-rpc",
- "polkadot-runtime",
- "polkadot-runtime-common",
- "polkadot-runtime-constants",
  "polkadot-runtime-parachains",
  "polkadot-statement-distribution",
  "polkadot-test-client",
@@ -12883,7 +12879,6 @@ dependencies = [
  "sp-transaction-pool",
  "sp-version",
  "sp-weights",
- "staging-kusama-runtime",
  "substrate-prometheus-endpoint",
  "tempfile",
  "thiserror",