This is a partial upgrade as only the Relay Chain and Asset Hub are affected. This release locks the Identity pallet and will enable migration to the People Chain.

Note to all wallets/UIs: Identity will be unusable until the launch of the People Chain and migration of info there. UIs should also prepare to read Identity information from the People Chain once it launches. Total expected downtime is 2-3 weeks.

Release notes: https://github.com/polkadot-fellows/runtimes/releases/tag/v1.2.6

Enactment is set for [8 July](https://polkadot.subscan.io/block/21558000).

Here's a table that should help UIs know what to do:

| Polkadot Relay Version | Polkadot People Chain Version | What it means                                                                                                                                                 |
| ------------- | -------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| v1.2.5        | N/A                  | Accounts can no longer `request_judgement`. Registrars should address all outstanding requests.                                                               |
| v1.2.6        | v1.2.6               | Identity is fully locked on the Relay Chain. The state still exists, but users cannot update/create/judge/etc. The info is used for the People Chain genesis. |
| v1.2.7        | v1.2.6               | Identities are being "reaped" on the Relay Chain and deposits freed. All UIs should start fetching Identity from the People Chain.                            |
| v1.2.7        | v1.2.7               | Migration is complete and People Chain has full functionality restored (at about 100x deposit reduction).                                                     |

See [`Pallet::dispatch_whitelisted_call_with_preimage`].

- **Problem Statement:** Partial upgrade affecting the Relay Chain and Asset Hub, locking the Identity pallet for migration to the People Chain, causing 2-3 weeks of expected downtime.
- **Significance:** Impacts wallets/UIs as Identity will be unusable until migration to the People Chain, requiring UIs to read Identity info from the People Chain post-launch.
- **Proposed Solution:** Release v1.2.6 locks Identity on the Relay Chain for migration to the People Chain, with subsequent versions facilitating Identity migration.
- **Expected Outcomes:** Migration completion with People Chain fully functional, including a significant deposit reduction, enhancing overall system efficiency.

#872 [Whitelisted Caller] Upgrade Polkadot: v1.2.6

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