Fix type on LoadClip being marked as asset (#6207)

Previously, asset conversion was performed on any combo widget on a
valid node. As the `type` widget on LoadClip was also a combo widget, it
was being incorrectly converted.

This PR changes the isAssetBrowserEligible check to also verify the
widget name is correct.
<img width="694" height="174" alt="image"
src="https://github.com/user-attachments/assets/a8523ade-7f59-4480-b5e6-8782fd680106"
/>


┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-6207-Fix-type-on-LoadClip-being-marked-as-asset-2946d73d3650811690f8d3a221a5b76d)
by [Unito](https://www.unito.io)

tests-ui/tests/renderer/extensions/vueNodes/widgets/composables/useComboWidget.test.ts

@@ -163,7 +163,8 @@ describe('useComboWidget', () => {
     )
     expect(mockSettingStoreGet).toHaveBeenCalledWith('Comfy.Assets.UseAssetAPI')
     expect(vi.mocked(assetService.isAssetBrowserEligible)).toHaveBeenCalledWith(
-      'CheckpointLoaderSimple'
+      'CheckpointLoaderSimple',
+      'ckpt_name'
     )
     expect(widget).toBe(mockWidget)
   })