chore(rds): add aurora postgres engine version v17.5. (#34900)

Issue # (if applicable)

Closes #34896

### Reason for this change

Add missing Aurora Postgres Engine Version v17.5

### Description of changes

Added the new Engine Version

### Describe any new or updated permissions being added

NA


### Description of how you validated changes

NA

### 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)

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

Author: anuprajg

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

@@ -1259,6 +1259,8 @@ export class AuroraPostgresEngineVersion {
   public static readonly VER_17_2 = AuroraPostgresEngineVersion.of('17.2', '17', { s3Import: true, s3Export: true });
   /** Version "17.4". */
   public static readonly VER_17_4 = AuroraPostgresEngineVersion.of('17.4', '17', { s3Import: true, s3Export: true });
+  /** Version "17.5". */
+  public static readonly VER_17_5 = AuroraPostgresEngineVersion.of('17.5', '17', { s3Import: true, s3Export: true });
 
   /**
    * Create a new AuroraPostgresEngineVersion with an arbitrary version.