(rds): Add SqlServerEngineVersion constants for engine v17

### Describe the feature

This was already requested in this issue https://github.com/aws/aws-cdk/issues/36212 but at that time SQL Server 2025 (v17) was not available as rds service.
Now it is available, so please add the constants and maybe other neccessary things for engine v17:

```powershell
aws rds describe-db-engine-versions `
--filters Name=engine,Values=sqlserver-ee,sqlserver-se,sqlserver-ex `
--query "DBEngineVersions[?starts_with(EngineVersion, '17')].[Engine,EngineVersion]" `
[
[
"sqlserver-ee",
"17.00.4045.5.v1"
],
[
"sqlserver-ex",
"17.00.4045.5.v1"
],
[
"sqlserver-se",
"17.00.4045.5.v1"
]
]
```

### Use Case

To directly use SQL Server 2025 from CDK

### Proposed Solution

_No response_

### Other Information

_No response_

### Acknowledgements

- [ ] I may be able to implement this feature request
- [ ] This feature might incur a breaking change

### AWS CDK Library version (aws-cdk-lib)

aws-cdk-lib@2.262.0

### AWS CDK CLI version

2.1133.0

### Environment details (OS name and version, etc.)

Win11

Search the repository for the existing SqlServerEngineVersion constants and related RDS engine-version definitions. Compare the v17 values with the AWS CLI results in the issue, then check adjacent tests or usages for any required updates; done means CDK users can select SQL Server 2025 directly.

Written by the indexing model from the issue text.