Remove deprecated sort prop in <DataGridHeaderCell>

[Luwangel]

Follows issue #5059 and PR #5094

Is your feature request related to a problem? Please describe.

The renaming has already be done. But we need to remove deprecated props.

The original issue is motivated by the confusion introduced by two similar names (sort in <Datagrid> and sort in <DatagridHeaderCell>) containing different content. The first one contains an object { field: 'id', order: 'ASC' } named sort and the second one { sort: 'id', order: 'ASC' }.

Describe the solution you'd like

Remove sort in favor to field in the <DatagridHeaderCell>.

Files concerned:

• packages/ra-ui-materialui/src/list/DatagridHeaderCell.js (line 64)

[WiXSL]

Fixed by #7065