feat(events): fromApiDestinationAttributes import method (#29943)

### Issue # (if applicable)

Closes #29942

### Reason for this change

Allows existing API Destinations to be imported and attached to additional rules

### Description of changes

* Added `ApiDestination.fromApiDestinationAttributes` method

### Description of how you validated changes

Added unit and integ tests

### Checklist
- [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md)

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