perf(DataTable): speed up select-all with large tables

Rewrite `setAllSelectedState` to improve peformance with
large tables. In my test case with 10000 rows, selecting
all rows previously took 14000ms. This fix reduces it to
8ms. It uses one instance of (local) variable mutation.
Fixes #6146.

.

packages/react/src/components/DataTable/DataTable.js

@@ -486,19 +486,16 @@ class DataTable extends React.Component {
    */
   setAllSelectedState = (initialState, isSelected, filteredRowIds) => {
     const { rowIds } = initialState;
+    const isFiltered = rowIds.length != filteredRowIds.length;
     return {
-      rowsById: rowIds.reduce(
-        (acc, id) => ({
-          ...acc,
-          [id]: {
-            ...initialState.rowsById[id],
-            ...(!initialState.rowsById[id].disabled && {
-              isSelected: filteredRowIds.includes(id) && isSelected,
-            }),
-          },
-        }),
-        {}
-      ),
+      rowsById: rowIds.reduce((acc, id) => {
+        const row = { ...initialState.rowsById[id] };
+        if (!row.disabled && (!isFiltered || filteredRowIds.includes(id))) {
+          row.isSelected = isSelected;
+        }
+        acc[id] = row; // Local mutation for performance with large tables
+        return acc;
+      }, {}),
     };
   };