settings-sync: set value before decrementing the CountDownLatch which waits for this value to be set

Otherwise, countDown() can release the latch, when the pushSnapshot is not set yet which results in UninitializedPropertyAccessException.

GitOrigin-RevId: 14153a622d1a2ef4913ea10471bc939f3aaf02fd

plugins/settings-sync/tests/com/intellij/settingsSync/TestRemoteCommunicator.kt

@@ -21,8 +21,8 @@ internal abstract class TestRemoteCommunicator : SettingsSyncRemoteCommunicator
 
   protected fun settingsPushed(snapshot: SettingsSnapshot) {
     if (::pushedLatch.isInitialized) {
-      pushedLatch.countDown()
       pushedSnapshot = snapshot
+      pushedLatch.countDown()
     }
   }