[DataGrid] Make data source stable

[MBilalShafi]

Closes #15488

• Merge [DataGrid] Update the signature of the onDataSourceError() callback #16718

Changelog

Breaking changes

• The data source feature and its related props are now stable.

   <DataGridPro
  -  unstable_dataSource={dataSource}
  -  unstable_dataSourceCache={cache}
  -  unstable_lazyLoading
  -  unstable_lazyLoadingRequestThrottleMs={100}
  +  dataSource={dataSource}
  +  dataSourceCache={cache}
  +  lazyLoading
  +  lazyLoadingRequestThrottleMs={100}
   />

• The data source API is now stable.

  - apiRef.current.unstable_dataSource.getRows()
  + apiRef.current.dataSource.getRows()

[mui-bot]

Deploy preview: https://deploy-preview-16710--material-ui-x.netlify.app/

Updated pages:

• docs/data/data-grid/row-grouping/row-grouping.md
• docs/data/data-grid/row-updates/row-updates.md
• docs/data/data-grid/server-side-data/aggregation.md
• docs/data/data-grid/server-side-data/index.md
• docs/data/data-grid/server-side-data/lazy-loading.md

Generated by 🚫 dangerJS against 5a1594f

[arminmeh]

I assume that we also need to put 'New' label to the server-side data menu item(s)