Unexpected `toggleAllRowsSelected` behaviour with server side pagination

[Faithfinder]

table/packages/table-core/src/features/RowSelection.ts

Lines 246 to 250 in db745af

	} else {
	preGroupedFlatRows.forEach(row => {
	delete rowSelection[row.id]
	})
	}

I believe the logic branch above should instead replace selection state with {}.

When paginating server side, selection state can contain rows from multiple pages, however since data only has one page at a time "Deselect all" only ever deselects current page, when it should deselect everything.

Related: #5875, for similar problem with "Select all" behaviour.