Events: cannot specify timezone for Schedule cron

### Describe the feature

In the console, when creating a Rule with an Event schedule, I have the option to use UTC or 'Local time zone'.

I can't seem to find a way of specifying this in CDK. It would be helpful if this is possible.

Here's my current implementation - if there's something I can add to this, that would be great.

```
const rule = new Rule(this.parent, `${this.stackName}-Rule-${ruleName}`, {
ruleName: `${this.stackName}-${ruleName}`,
schedule: Schedule.cron({
minute: "0",
hour: "8,20",
}),
});
```

### Use Case

For timezones such as Europe/London, currently if I want the schedule to be consistent all year around I need to manually update this field in the console after creating the Rule via CDK.

### Proposed Solution

An additional field, `timeZone` or similar.

const rule = new Rule(this.parent, `${this.stackName}-Rule-${ruleName}`, {
ruleName: `${this.stackName}-${ruleName}`,
schedule: Schedule.cron({
minute: "0",
hour: "8,20",
timeZone: "Europe/London"
}),
});

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### CDK version used

2.32.0

### Environment details (OS name and version, etc.)

MacOS Monterey 12.4

Start at the TypeScript definitions and entry points for Rule and Schedule.cron, then trace how the schedule is represented for the console's UTC or local-time-zone setting. Add support for the requested Europe/London-style timezone option and verify that the generated rule reflects it.

Written by the indexing model from the issue text.