[Bug Report][3.7.6] Virtual scroll keys messed up

[JChrist]

Environment

Vuetify Version: 3.7.6
Last working version: 3.7.5
Vue Version: 3.5.13
Browsers: Chrome 130.0.0.0
OS: Linux x86_64

Steps to reproduce

1. The VVirtualScroll component must be used, with items that happen to contain a field named value and does not happen to be unique among them.
2. Make any change to the list of items that causes a re-order/re-render to them. In the demo, click on "Change positions" a few times, items will become duplicated and/or move on random positions on 3.7.6, while everything works correctly on 3.7.5

The issue arises from this commit on the VVirtualScrollComponent,

which ends up using this as the VirtualScrollItem key.

Expected Behavior

The list of items inside the VVirtualScroll component should be re-ordered and re-rendered correctly

Actual Behavior

Vue issues a warning for duplicate keys and items get duplicated, or rendered to invalid positions.

Reproduction Link

https://play.vuetifyjs.com/#...