test: validate ERR_INVALID_THIS for scheduler methods

Signed-off-by: Daijiro Wachi <daijiro.wachi@gmail.com>
PR-URL: https://github.com/nodejs/node/pull/63764
Refs: https://app.codecov.io/gh/nodejs/node/blob/main/lib%2Ftimers%2Fpromises.js
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>

test/parallel/test-timers-promises-scheduler.js

@@ -49,3 +49,17 @@ testCancelableWait2().then(common.mustCall());
 assert.throws(() => new scheduler.constructor(), {
   code: 'ERR_ILLEGAL_CONSTRUCTOR',
 });
+
+assert.throws(() => {
+  scheduler.yield.call({});
+}, {
+  code: 'ERR_INVALID_THIS',
+  message: /Scheduler/,
+});
+
+assert.throws(() => {
+  scheduler.wait.call({}, 10);
+}, {
+  code: 'ERR_INVALID_THIS',
+  message: /Scheduler/,
+});