[Icon] Adds ProductUnavailable icon (#12297)

### WHY are these changes introduced?

Icon is needed to resolve [#132049](132049) <!-- link to issue if one
exists -->

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  Context about the problem that’s being addressed.
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### How to 🎩

🖥 [Local development
instructions](https://github.com/Shopify/polaris/blob/main/README.md#install-dependencies-and-build-workspaces)
🗒 [General tophatting
guidelines](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md)
📄 [Changelog
guidelines](https://github.com/Shopify/polaris/blob/main/.github/CONTRIBUTING.md#changelog)

### 🎩 checklist

- [ ] Tested a
[snapshot](https://github.com/Shopify/polaris/blob/main/documentation/Releasing.md#-snapshot-releases)
- [ ] Tested on
[mobile](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting.md#cross-browser-testing)
- [ ] Tested on [multiple
browsers](https://help.shopify.com/en/manual/shopify-admin/supported-browsers)
- [ ] Tested for
[accessibility](https://github.com/Shopify/polaris/blob/main/documentation/Accessibility%20testing.md)
- [ ] Updated the component's `README.md` with documentation changes
- [ ] [Tophatted
documentation](https://github.com/Shopify/polaris/blob/main/documentation/Tophatting%20documentation.md)
changes in the style guide

.changeset/twenty-months-shake.md

@@ -0,0 +1,5 @@
+---
+'@shopify/polaris-icons': minor
+---
+
+Adds ProdcutUnavailable icon

polaris-icons/icons/ProductUnavailableIcon.yml

@@ -0,0 +1,10 @@
+name: Product unavailable
+description: When a product has been deleted and is no longer available
+keywords:
+  - Product
+authors:
+  - Joe Thomas
+date_added: 2024-06-21
+date_modified: 2024-06-21
+# Optional: fill exclusive_use if the icon should *only* be used
+# in specific areas of the admin (such as “Orders”):