Virtualize support for controlling scroll position

[javiercn]

Related issues:

• Virtualize component Row Index Enhancements (API to scroll to item) #26943 (scroll to row index API),
• Blazor Virtualize: root-level scrolling breaks on horizontal scroll enabled in the container #58200 (scroll position bugs),
• Virtualization supports anchor modes #65742 (top/end anchoring),
• Virtualize: visible content shifts when in-DOM items above the viewport change height #65939 (viewport anchoring).

[MihuBot]

I'm a bot. Here are possible related and/or duplicate issues (I may be wrong):

• Virtualize component: Add a method to scroll to an item #44219
• Scroll Virtualize component to index #37847
• Setting custom StartIndex in Blazor Virtualize #29381