chore(flux): update image docker.io/rancher/system-upgrade-controller v0.15.1 → v0.15.2 (clustertool) (#33025)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[docker.io/rancher/system-upgrade-controller](https://redirect.github.com/rancher/system-upgrade-controller)
| patch | `v0.15.1` -> `v0.15.2` |

---

### Release Notes

<details>
<summary>rancher/system-upgrade-controller
(docker.io/rancher/system-upgrade-controller)</summary>

###
[`v0.15.2`](https://redirect.github.com/rancher/system-upgrade-controller/releases/tag/v0.15.2)

[Compare
Source](https://redirect.github.com/rancher/system-upgrade-controller/compare/v0.15.1...v0.15.2)

#### What's Changed

- support k8s 1.32.2 by
[@&#8203;jiaqiluo](https://redirect.github.com/jiaqiluo) in
[https://github.com/rancher/system-upgrade-controller/pull/352](https://redirect.github.com/rancher/system-upgrade-controller/pull/352)

**Full Changelog**:
https://github.com/rancher/system-upgrade-controller/compare/v0.15.1...v0.15.2

</details>

---

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♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
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---

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---

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clustertool/embed/generic/kubernetes/system/system-upgrade-controller/app/helm-release.yaml

@@ -31,7 +31,7 @@ spec:
           app:
             image:
               repository: docker.io/rancher/system-upgrade-controller
-              tag: v0.15.1@sha256:365ba1a4af94a330466df87388271ddb3d324b2f9385cde6b4d1d39f39174639
+              tag: v0.15.2@sha256:3e899833afcea9a8788d384ce976df9a05be84636fe5c01ec2307b5bd8fe9810
             env:
               SYSTEM_UPGRADE_CONTROLLER_DEBUG: false
               SYSTEM_UPGRADE_CONTROLLER_THREADS: 2