feat(rds): support performance insights configuration at cluster level (

#31385)

### Issue # (if applicable)

Closes #31375 .

### Reason for this change



Properties for Performance Insights at cluster level are supported in L1, but not in L2.

### Description of changes



Added the properties in props for Database Cluster.

### Description of how you validated changes



Both unit tests 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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