chore(rds): add support for 8.0.mysql_aurora.3.08.0 (aws#32180)

(description based on aws#30479)

### Issue # (if applicable)

n/A

### Reason for this change

Add support for newly supported 8.0.mysql_aurora.3.08.0.  
https://docs.aws.amazon.com/AmazonRDS/latest/AuroraMySQLReleaseNotes/AuroraMySQL.Updates.3080.html


### Description of changes

Add a new version as a new property to AuroraMysqlEngineVersion class.


### Description of how you validated changes

I used the AWS CLI to verify that the new version is available.

```sh
$ aws rds describe-db-engine-versions --engine aurora-mysql --query "DBEngineVersions[?EngineVersion=='8.0.mysql_aurora.3.08.0']"

[
    {
        "Engine": "aurora-mysql",
        "EngineVersion": "8.0.mysql_aurora.3.08.0",
        "DBParameterGroupFamily": "aurora-mysql8.0",
        "DBEngineDescription": "Aurora MySQL",
        "DBEngineVersionDescription": "Aurora MySQL 3.08.0 (compatible with MySQL 8.0.39)",
        "ValidUpgradeTarget": [],
        "ExportableLogTypes": [
            "audit",
            "error",
            "general",
            "slowquery"
        ],
        "SupportsLogExportsToCloudwatchLogs": true,
        "SupportsReadReplica": false,
        "SupportedEngineModes": [
            "provisioned"
        ],
        "SupportedFeatureNames": [
            "Bedrock"
        ],
        "Status": "available",
        "SupportsParallelQuery": true,
        "SupportsGlobalDatabases": true,
        "MajorEngineVersion": "8.0",
        "SupportsBabelfish": false,
        "SupportsCertificateRotationWithoutRestart": true,
        "SupportedCACertificateIdentifiers": [
            "rds-ca-ecc384-g1",
            "rds-ca-rsa4096-g1",
            "rds-ca-rsa2048-g1"
        ],
        "SupportsLocalWriteForwarding": true,
        "SupportsIntegrations": true
    }
]

```

### 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: ren-yamanashi

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

@@ -636,6 +636,8 @@ export class AuroraMysqlEngineVersion {
   public static readonly VER_3_07_0 = AuroraMysqlEngineVersion.builtIn_8_0('3.07.0');
   /** Version "8.0.mysql_aurora.3.07.1". */
   public static readonly VER_3_07_1 = AuroraMysqlEngineVersion.builtIn_8_0('3.07.1');
+  /** Version "8.0.mysql_aurora.3.08.0". */
+  public static readonly VER_3_08_0 = AuroraMysqlEngineVersion.builtIn_8_0('3.08.0');
 
   /**
    * Create a new AuroraMysqlEngineVersion with an arbitrary version.

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

@@ -164,6 +164,9 @@ describe('cluster engine', () => {
     const engine_ver_3_07_1 = DatabaseClusterEngine.auroraMysql({
       version: AuroraMysqlEngineVersion.VER_3_07_1,
     });
+    const engine_ver_3_08_0 = DatabaseClusterEngine.auroraMysql({
+      version: AuroraMysqlEngineVersion.VER_3_08_0,
+    });
 
     // THEN
     expect(engine_VER_14_3.parameterGroupFamily).toEqual('aurora-postgresql14');
@@ -180,5 +183,6 @@ describe('cluster engine', () => {
     expect(engine_ver_2_8_4.parameterGroupFamily).toEqual('aurora-mysql5.7');
     expect(engine_ver_2_11_3.parameterGroupFamily).toEqual('aurora-mysql5.7');
     expect(engine_ver_3_07_1.parameterGroupFamily).toEqual('aurora-mysql8.0');
+    expect(engine_ver_3_08_0.parameterGroupFamily).toEqual('aurora-mysql8.0');
   });
 });