chain-spec: getting ready for native-runtime-free world (#1256)

This PR prepares chains specs for _native-runtime-free_  world.

This PR has following changes:
- `substrate`:
  - adds support for:
- JSON based `GenesisConfig` to `ChainSpec` allowing interaction with
runtime `GenesisBuilder` API.
- interacting with arbitrary runtime wasm blob to[
`chain-spec-builder`](https://github.com/paritytech/substrate/blob/3ef576eaeb3f42610e85daecc464961cf1295570/bin/utils/chain-spec-builder/src/lib.rs#L46)
command line util,
- removes
[`code`](https://github.com/paritytech/substrate/blob/3ef576eaeb3f42610e85daecc464961cf1295570/frame/system/src/lib.rs#L660)
from `system_pallet`
  - adds `code` to the `ChainSpec`
- deprecates
[`ChainSpec::from_genesis`](https://github.com/paritytech/substrate/blob/3ef576eaeb3f42610e85daecc464961cf1295570/client/chain-spec/src/chain_spec.rs#L263),
but also changes the signature of this method extending it with `code`
argument.
[`ChainSpec::builder()`](https://github.com/paritytech/substrate/blob/20bee680ed098be7239cf7a6b804cd4de267983e/client/chain-spec/src/chain_spec.rs#L507)
should be used instead.
- `polkadot`:
- all references to `RuntimeGenesisConfig` in `node/service` are
removed,
- all
`(kusama|polkadot|versi|rococo|wococo)_(staging|dev)_genesis_config`
functions now return the JSON patch for default runtime `GenesisConfig`,
  - `ChainSpecBuilder` is used, `ChainSpec::from_genesis` is removed,

- `cumulus`:
  - `ChainSpecBuilder` is used, `ChainSpec::from_genesis` is removed,
- _JSON_ patch configuration used instead of `RuntimeGenesisConfig
struct` in all chain specs.
  
---------

Co-authored-by: command-bot <>
Co-authored-by: Javier Viola <javier@parity.io>
Co-authored-by: Davide Galassi <davxy@datawok.net>
Co-authored-by: Francisco Aguirre <franciscoaguirreperez@gmail.com>
Co-authored-by: Kevin Krone <kevin@parity.io>
Co-authored-by: Bastian Köcher <git@kchr.de>

substrate/test-utils/runtime/res/default_genesis_config_invalid.json

@@ -0,0 +1,113 @@
+{
+  "system": {},
+  "babe": {
+    "renamed_authorities": [
+      [
+        "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY",
+        1
+      ],
+      [
+        "5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",
+        1
+      ],
+      [
+        "5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y",
+        1
+      ]
+    ],
+    "epochConfig": {
+      "c": [
+        3,
+        10
+      ],
+      "allowed_slots": "PrimaryAndSecondaryPlainSlots"
+    }
+  },
+  "substrateTest": {
+    "authorities": [
+      "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY",
+      "5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",
+      "5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y"
+    ]
+  },
+  "balances": {
+    "balances": [
+      [
+        "5D34dL5prEUaGNQtPPZ3yN5Y6BnkfXunKXXz6fo7ZJbLwRRH",
+        100000000000000000
+      ],
+      [
+        "5GBNeWRhZc2jXu7D55rBimKYDk8PGk8itRYFTPfC8RJLKG5o",
+        100000000000000000
+      ],
+      [
+        "5Dfis6XL8J2P6JHUnUtArnFWndn62SydeP8ee8sG2ky9nfm9",
+        100000000000000000
+      ],
+      [
+        "5F4H97f7nQovyrbiq4ZetaaviNwThSVcFobcA5aGab6167dK",
+        100000000000000000
+      ],
+      [
+        "5DiDShBWa1fQx6gLzpf3SFBhMinCoyvHM1BWjPNsmXS8hkrW",
+        100000000000000000
+      ],
+      [
+        "5EFb84yH9tpcFuiKUcsmdoF7xeeY3ajG1ZLQimxQoFt9HMKR",
+        100000000000000000
+      ],
+      [
+        "5DZLHESsfGrJ5YzT3HuRPXsSNb589xQ4Unubh1mYLodzKdVY",
+        100000000000000000
+      ],
+      [
+        "5GHJzqvG6tXnngCpG7B12qjUvbo5e4e9z8Xjidk3CQZHxTPZ",
+        100000000000000000
+      ],
+      [
+        "5CUnSsgAyLND3bxxnfNhgWXSe9Wn676JzLpGLgyJv858qhoX",
+        100000000000000000
+      ],
+      [
+        "5CVKn7HAZW1Ky4r7Vkgsr7VEW88C2sHgUNDiwHY9Ct2hjU8q",
+        100000000000000000
+      ],
+      [
+        "5H673aukQ4PeDe1U2nuv1bi32xDEziimh3PZz7hDdYUB7TNz",
+        100000000000000000
+      ],
+      [
+        "5HTe9L15LJryjUAt1jZXZCBPnzbbGnpvFwbjE3NwCWaAqovf",
+        100000000000000000
+      ],
+      [
+        "5D7LFzGpMwHPyDBavkRbWSKWTtJhCaPPZ379wWLT23bJwXJz",
+        100000000000000000
+      ],
+      [
+        "5CLepMARnEgtVR1EkUuJVUvKh97gzergpSxUU3yKGx1v6EwC",
+        100000000000000000
+      ],
+      [
+        "5Chb2UhfvZpmjjEziHbFbotM4quX32ZscRV6QJBt1rUKzz51",
+        100000000000000000
+      ],
+      [
+        "5HmRp3i3ZZk7xsAvbi8hyXVP6whSMnBJGebVC4FsiZVhx52e",
+        100000000000000000
+      ],
+      [
+        "5GrwvaEF5zXb26Fz9rcQpDWS57CtERHpNehXCPcNoHGKutQY",
+        100000000000000000
+      ],
+      [
+        "5FHneW46xGXgs5mUiveU4sbTyGBzmstUspZC92UhjJM694ty",
+        100000000000000000
+      ],
+      [
+        "5FLSigC9HGRKVhB9FiEo4Y3koPsNmBmLJbpXg2mp1hXcS59Y",
+        100000000000000000
+      ]
+    ]
+  }
+}