rds: cannot upgrade rds minor engine version with DatabaseInstanceReadReplica

### Describe the bug

I got an error when trying to upgrade a minor version of the RDS Postgres consisting of Primary and Replica instances.
```
6:27:42 PM | UPDATE_FAILED | AWS::RDS::DBInstance | rds
One or more of the DB Instance's read replicas need to be upgraded: rds-read (Service: Rds, Status Code: 400, Request ID: xxx)
```
It looks like CDK is trying to upgrade only the Primary instance (or trying to do it first)

### Expected Behavior

Automatically upgrade the Replicas along with the Primary with the right order or allow to specify engine version to `aws_rds.DatabaseInstanceReadReplica`.

```
rds = aws_rds.DatabaseInstance(
...
engine=aws_rds.DatabaseInstanceEngine.postgres(version=RDS_VERSION),
...
)

rds_read = aws_rds.DatabaseInstanceReadReplica(
...
source_database_instance=rds,
engine=aws_rds.DatabaseInstanceEngine.postgres(version=RDS_VERSION),
...
_
```

### Current Behavior

The error occurs.

### Reproduction Steps

Prepare and RDS stack with min. one replica, deploy, increase a minor version and deploy again

```
RDS_VERSION = aws_rds.PostgresEngineVersion.VER_11_19

rds = aws_rds.DatabaseInstance(
self,
"rds",
credentials=aws_rds.Credentials.from_generated_secret("postgres"),
engine=aws_rds.DatabaseInstanceEngine.postgres(version=RDS_VERSION),
instance_type=aws_ec2.InstanceType(instance_type),
multi_az=True,
vpc=vpc,
vpc_subnets=aws_ec2.SubnetSelection(
subnet_group_name=shared.SUBNETS_GENERAL_ISOLATED,
),
publicly_accessible=False,
security_groups=[rds_sg],
storage_encrypted=True,
allocated_storage=RDS_INITIAL_STORAGE,
max_allocated_storage=RDS_MAX_STORAGE,
performance_insight_retention=aws_rds.PerformanceInsightRetention.DEFAULT,
cloudwatch_logs_exports=["postgresql", "upgrade"],
backup_retention=Duration.days(RDS_BACKUP_RETENTION),
preferred_maintenance_window="sat:08:10-sat:10:10",
preferred_backup_window="03:10-04:10",
)

rds_read = aws_rds.DatabaseInstanceReadReplica(
self,
"rds-read",
source_database_instance=rds,
instance_type=aws_ec2.InstanceType(replica_instance_type),
publicly_accessible=False,
multi_az=False,
storage_encrypted=True,
vpc=vpc,
vpc_subnets=aws_ec2.SubnetSelection(
subnet_group_name=shared.SUBNETS_GENERAL_ISOLATED,
),
security_groups=[rds_sg],
performance_insight_retention=aws_rds.PerformanceInsightRetention.DEFAULT,
max_allocated_storage=RDS_MAX_STORAGE,
preferred_maintenance_window="sat:08:10-sat:10:10",
)
```

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

2.91.0

### Framework Version

_No response_

### Node.js Version

18

### OS

Ubuntu

### Language

Python

### Language Version

3.11.4

### Other information

_No response_

Start from the DatabaseInstance and DatabaseInstanceReadReplica entry points and reproduce the minor-version update with a primary and replica using the supplied Python example. Trace the generated resource update ordering and replica engine-version handling; done means the stack can upgrade the primary and replica without the RDS dependency error, with coverage for the reproduction.

Written by the indexing model from the issue text.