chore(rds): postgres 16.10 (#36173)

### Issue # (if applicable)

None

### Reason for this change

https://docs.aws.amazon.com/AmazonRDS/latest/PostgreSQLReleaseNotes/postgresql-versions.html#postgresql-versions-version1610

### Description of changes

### Describe any new or updated permissions being added

### Description of how you validated changes

```
aws rds describe-db-engine-versions --engine aurora-postgresql --output table --query 'DBEngineVersions[*].{Engine:Engine,EngineVersion:EngineVersion}'

-----------------------------------------
|       DescribeDBEngineVersions        |
+--------------------+------------------+
|       Engine       |  EngineVersion   |
+--------------------+------------------+
...
|  aurora-postgresql |  16.9            |
|  aurora-postgresql |  16.9-limitless  |
|  aurora-postgresql |  16.10           |
...
```

### 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)

----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

Author: phadadi

packages/aws-cdk-lib/aws-rds/lib/cluster-engine.ts

@@ -1312,6 +1312,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_16_9 = AuroraPostgresEngineVersion.of('16.9', '16', { s3Import: true, s3Export: true });
   /** Version "16.9 limitless" */
   public static readonly VER_16_9_LIMITLESS = AuroraPostgresEngineVersion.of('16.9-limitless', '16', { s3Import: true, s3Export: true });
+  /** Version "16.10". */
+  public static readonly VER_16_10 = AuroraPostgresEngineVersion.of('16.10', '16', { s3Import: true, s3Export: true });
 
   /**
    * Version "17.1"