Please add support to specify EnableContinuousBackup when creating BackupPlanRule. EnableContinuousBackup was added to CloudFormation Resource specification v35.0.0

Use Case

EnableContinuousBackup is required to have point-in-time recovery for RDS, when using only AWS Backup without automatic snapshots on RDS.

Proposed Solution

Other

https://aws.amazon.com/blogs/storage/point-in-time-recovery-and-continuous-backup-for-amazon-rds-with-aws-backup/

Currently I'm using escape hatch, but it's fragile solution because it's depends on rules order.

const cfBackupPlan = plan.node.defaultChild as backup.CfnBackupPlan;
cfBackupPlan.addPropertyOverride("BackupPlan.BackupPlanRule.0.EnableContinuousBackup", true);

• 👋 I may be able to implement this feature request
• ⚠️ This feature might incur a breaking change

This is a 🚀 Feature Request