…5533)

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## **Description**
Following #24313 we're
looking to centralize all tools and test resources in one place.
This PR moves spec files for `Notifications`, `Identity` and
`Multichain-accounts` specs to `/tests`.

Previous related PRs:
- #24988
- #24313
- #25031
- #25095
- #25167
- #25198
- #25219
- #25263
- #25279
- #25520


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## **Changelog**

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CHANGELOG entry:

## **Related issues**

Fixes:

## **Manual testing steps**

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

## **Screenshots/Recordings**

<!-- If applicable, add screenshots and/or recordings to visualize the
before and after of your change. -->

### **Before**

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### **After**

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## **Pre-merge author checklist**

- [ ] I've followed [MetaMask Contributor
Docs](https://github.com/MetaMask/contributor-docs) and [MetaMask Mobile
Coding
Standards](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/CODING_GUIDELINES.md).
- [ ] I've completed the PR template to the best of my ability
- [ ] I've included tests if applicable
- [ ] I've documented my code using [JSDoc](https://jsdoc.app/) format
if applicable
- [ ] I've applied the right labels on the PR (see [labeling
guidelines](https://github.com/MetaMask/metamask-mobile/blob/main/.github/guidelines/LABELING_GUIDELINES.md)).
Not required for external contributors.

## **Pre-merge reviewer checklist**

- [ ] I've manually tested the PR (e.g. pull and build branch, run the
app, test code being changed).
- [ ] I confirm that this PR addresses all acceptance criteria described
in the ticket it closes and includes the necessary testing evidence such
as recordings and or screenshots.


<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk: changes are confined to test code and Jest configuration,
but broad import-path rewrites could still break CI test discovery or
shared helpers if any path is missed.
> 
> **Overview**
> Moves Identity, Notifications, Multichain Accounts (and related
network) E2E/spec coverage under `tests/` and updates a wide set of
specs/helpers to import shared pages, tags, fixtures, mocks, and
utilities from the new locations.
> 
> Updates test infrastructure references accordingly (e.g., notification
mock helpers now sourced from `tests/smoke/notifications/...`) and
tweaks `package.json` `test:unit` to run `jest` against
`./tests/**/*.test.ts` instead of `./e2e/**/*.test.ts`, reflecting the
new test layout.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
e7ef33f. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->