fix(autoscaling): add timezone property to Scheduled Action (#17330)

Add timezone property to ScheduledAction.

example:
```typescript
import * as asg from '@aws-cdk/aws-autoscaling';

new asg.ScheduledAction(this, 'test', {
    autoScalingGroup: 'test',
    desiredCapacity: 1,
    minCapacity: 1,
    maxCapacity: 2,
    schedule: {
        expressionString: '0 3 * * *'
    },
    timeZone: 'Asia/Seoul'
});
```

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

packages/@aws-cdk/aws-autoscaling/lib/scheduled-action.ts

@@ -8,6 +8,17 @@ import { Schedule } from './schedule';
  * Properties for a scheduled scaling action
  */
 export interface BasicScheduledActionProps {
+  /**
+   * Specifies the time zone for a cron expression. If a time zone is not provided, UTC is used by default.
+   *
+   * Valid values are the canonical names of the IANA time zones, derived from the IANA Time Zone Database (such as Etc/GMT+9 or Pacific/Tahiti).
+   *
+   * For more information, see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones.
+   *
+   * @default - UTC
+   *
+   */
+  readonly timeZone?: string;
   /**
    * When to perform this action.
    *
@@ -94,6 +105,7 @@ export class ScheduledAction extends Resource {
       maxSize: props.maxCapacity,
       desiredCapacity: props.desiredCapacity,
       recurrence: props.schedule.expressionString,
+      timeZone: props.timeZone,
     });
   }
 }

packages/@aws-cdk/aws-autoscaling/test/scheduled-action.test.ts

@@ -46,6 +46,27 @@ describe('scheduled action', () => {
 
   });
 
+  test('have timezone property', () => {
+    // GIVEN
+    const stack = new cdk.Stack();
+    const asg = makeAutoScalingGroup(stack);
+
+    // WHEN
+    asg.scaleOnSchedule('ScaleOutAtMiddaySeoul', {
+      schedule: autoscaling.Schedule.cron({ hour: '12', minute: '0' }),
+      minCapacity: 12,
+      timeZone: 'Asia/Seoul',
+    });
+
+    // THEN
+    expect(stack).to(haveResource('AWS::AutoScaling::ScheduledAction', {
+      MinSize: 12,
+      Recurrence: '0 12 * * *',
+      TimeZone: 'Asia/Seoul',
+    }));
+
+  });
+
   test('autoscaling group has recommended updatepolicy for scheduled actions', () => {
     // GIVEN
     const stack = new cdk.Stack();