Rococo Identity Migration Part 2 + Bug Fix (#2946)

Order:

- [x] Start People Chain
- [RPC
node](https://polkadot.js.org/apps/?rpc=wss%3A%2F%2Frococo-people-rpc.polkadot.io#/explorer)
- [x] Upgrade Rococo Relay (`EnsureRoot` -> `EnsureSigned`) (v1,006,002)
- Done
[here](https://rococo.subscan.io/extrinsic/0xef07e0f9dbb2b9e829305f132e6ce45d291239286e409177e20895e6687daa6c)
- [x] Migrate all identities
- Done, see extrinsics from [this
account](https://rococo.subscan.io/account/5FyNYrBwndvBttTkGUqGGCRAXtBH4Mh8xELDaxaFywTsjDKb)
- [x] Upgrade Rococo People (remove call filter) (v1,006,002)
- Authorized
[here](https://rococo.subscan.io/extrinsic/0xedf6a80229bd411b7ed8d3a489a767b0f773bed5c49239987a294c293a35b98b)

With added:

- [x] Upgrade Rococo People to fix `poke_deposit` bug (v1,006,001)
- Authorized
[here](https://rococo.subscan.io/extrinsic/0xd1dc3cd6e8274bd0196f8d9f13ed09f6e9c76e6a40f9786a1629f4cb22cf948d)

Note:

It's also possible to remove the Identity Migrator pallet from both the
Relay Chain and the parachain at this time. I will leave them in for now
to preserve the test cases until we run them on Kusama/Polkadot. We will
also want a follow up to remove all Identity-related state from the
Relay Chain.

polkadot/runtime/rococo/src/lib.rs

@@ -79,7 +79,7 @@ use frame_support::{
 	weights::{ConstantMultiplier, WeightMeter},
 	PalletId,
 };
-use frame_system::EnsureRoot;
+use frame_system::{EnsureRoot, EnsureSigned};
 use pallet_grandpa::{fg_primitives, AuthorityId as GrandpaId};
 use pallet_identity::legacy::IdentityInfo;
 use pallet_session::historical as session_historical;
@@ -150,7 +150,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("rococo"),
 	impl_name: create_runtime_str!("parity-rococo-v2.0"),
 	authoring_version: 0,
-	spec_version: 1_006_001,
+	spec_version: 1_006_002,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 24,
@@ -1142,8 +1142,7 @@ impl auctions::Config for Runtime {
 
 impl identity_migrator::Config for Runtime {
 	type RuntimeEvent = RuntimeEvent;
-	// To be changed to `EnsureSigned` once there is a People Chain to migrate to.
-	type Reaper = EnsureRoot<AccountId>;
+	type Reaper = EnsureSigned<AccountId>;
 	type ReapIdentityHandler = ToParachainIdentityReaper<Runtime, Self::AccountId>;
 	type WeightInfo = weights::runtime_common_identity_migrator::WeightInfo<Runtime>;
 }