tools: enable no-unused-expressions lint rule

Fixes: https://github.com/nodejs/node/issues/36246

PR-URL: https://github.com/nodejs/node/pull/36248
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-buffer-backing-arraybuffer.js

@@ -31,7 +31,7 @@ for (const { length, expectOnHeap } of tests) {
                        `for ${array.constructor.name}, length = ${length}`);
 
     // Consistency check: Accessing .buffer should create it.
-    array.buffer;
+    array.buffer; // eslint-disable-line no-unused-expressions
     assert(arrayBufferViewHasBuffer(array));
   }
 }