Mark headerRenderer as unsupported for GridSortColumn

[web-padawan]

Currently, only GridFilterColumn has headerRenderer marked as unsupported:

react-components/src/GridFilterColumn.tsx

Lines 14 to 18 in e033b0b

	/*
	* According to https://github.com/vaadin/web-components/issues/1485, the
	* `headerRenderer` is not allowed for `vaadin-grid-filter-column`.
	*/
	export type GridFilterColumnProps<TItem> = Partial<

However, the vaadin-grid-sort-column element doesn't support headerRenderer either, see vaadin/hilla#1097

We should update GridSortColumn accordingly to avoid confusion.

[TatuLund]

I studied this more, and found another workaround to set title attribute to sorter.

        <Grid
          ref={(element) => {
            setTimeout(
              () =>
                element
                  ?.getElementsByTagName('vaadin-grid-sorter')[0]
                  .setAttribute('title', 'Sort by last name and first name'),
              100
            );
          }}
         ---
        >
        ...
        </Grid>