[data grid] Implement server-side data source with nested data lazy loading

[MBilalShafi]

This issue covers the server-side lazy loading for nested data (tree data and row grouping)
Currently, all the data for a selected tree data or row grouping node is fetched in one go, this feature will enable to load the nested data lazily by scrolling down.
This is an advanced lazy loading use case and will be followed up after #10857 is done.

Please feel free to upvote the issue to see it land faster.

If you are looking for plain-data lazy loading check #10857

Action points:

• Use strategies to handle differences in the way the data is processed. Context