[Darwin] On resubscribe attempt, if no need to subscribe, clear subsc ription work (project-chip#37177)

Author: jtung-apple

src/darwin/Framework/CHIP/MTRDevice_Concrete.mm

@@ -1487,6 +1487,7 @@ - (void)_reattemptSubscriptionNowIfNeededWithReason:(NSString *)reason
 
     os_unfair_lock_assert_owner(&self->_lock);
     if (!self.reattemptingSubscription) {
+        [self _clearSubscriptionPoolWork];
         return;
     }