…st` timers (#7970)

## Explanation

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## References

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## Checklist

- [ ] I've updated the test suite for new or updated code as appropriate
- [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or
updated code as appropriate
- [ ] I've communicated my changes to consumers by [updating changelogs
for packages I've
changed](https://github.com/MetaMask/core/tree/main/docs/processes/updating-changelogs.md)
- [ ] I've introduced [breaking
changes](https://github.com/MetaMask/core/tree/main/docs/processes/breaking-changes.md)
in this PR and have prepared draft pull requests for clients and
consumer packages to resolve them

<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Test-only changes plus removal of a dev dependency; risk is limited to
potential timer-mocking differences causing flaky/changed test behavior.
> 
> **Overview**
> Replaces Sinon-based fake timers in
`AnalyticsDataRegulationService.test.ts` with Jest timers, updating
retry/degraded/circuit-breaker tests to advance timers via
`jest.advanceTimersToNextTimerAsync` / `jest.advanceTimersByTime` and
managing lifecycle with `jest.useFakeTimers`/`jest.useRealTimers`.
> 
> Drops `sinon` from `analytics-data-regulation-controller` dev
dependencies (and lockfile), reducing the test-only dependency surface
without changing production code.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
637fff0. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->