Bug 1734997 - Don't reduce timer precision for post-task-delay.any.js r=smaug

If the timer preceision is reduced, the elapsed time between to
timers maybe shorter than the acutal result. And this fact
made this test to fail, so here we disable this feature for this
test.

Differential Revision: https://phabricator.services.mozilla.com/D139902

testing/web-platform/meta/scheduler/post-task-delay.any.js.ini

@@ -0,0 +1,6 @@
+[post-task-delay.any.worker.html]
+  prefs: [privacy.reduceTimerPrecision:false]
+[post-task-delay.any.sharedworker.html]
+  prefs: [privacy.reduceTimerPrecision:false]
+[post-task-delay.any.serviceworker.html]
+  prefs: [privacy.reduceTimerPrecision:false]