[aws-kinesisFirehose] - [BUG] - CfnDeliveryStream.ExtendedS3DestinationConfigurationProperty: file_extension parameter does not exist

### Name of the resource

AWS::KinesisFirehose::DeliveryStream

### Resource Name

aws:KinesisFireHose

### Issue Description

Using the file_extension parameter results in an error.
```
TypeError: CfnDeliveryStream.ExtendedS3DestinationConfigurationProperty.__init__() got an unexpected keyword argument 'file_extension'
```
Original issue posted in CDK(by the customer) -https://github.com/aws/aws-cdk/issues/32154

### Expected Behavior

as documented and seen in Cloudformation resource spec doc, this `file_Extension` property should be supported and not give any error

### Observed Behavior

Please refer to comment for code repro -https://github.com/aws/aws-cdk/issues/32154#issuecomment-2483625195

### Test Cases

NA

### Other Details

Links -

https://docs.aws.amazon.com/cdk/api/v2/python/aws_cdk.aws_kinesisfirehose/CfnDeliveryStream.html#aws_cdk.aws_kinesisfirehose.CfnDeliveryStream.ExtendedS3DestinationConfigurationProperty

Start with the CfnDeliveryStream.ExtendedS3DestinationConfigurationProperty entry point and review the linked AWS CDK reproduction and CloudFormation resource specification documentation. Done means the documented file_extension property is accepted without the reported unexpected-keyword error.

Written by the indexing model from the issue text.