aws-rds: add Aurora MySQL engine version 3.13.0

[pahud]

Describe the feature

Expose Aurora MySQL 3.13.0, compatible with MySQL 8.0.45, as a built-in AuroraMysqlEngineVersion constant. The engine version became generally available on August 28, 2026.

Use Case

CDK users should be able to select Aurora MySQL 3.13.0 through the same discoverable, strongly typed API used for earlier Aurora MySQL 3.x releases, with the correct aurora-mysql8.0 parameter group family.

Proposed Solution

Add AuroraMysqlEngineVersion.VER_3_13_0 using AuroraMysqlEngineVersion.builtIn_8_0('3.13.0') and include it in the parameter group family test matrix.

Implementation is available in #38736.

Other Information

• AWS announcement: Amazon Aurora MySQL 3.13 (compatible with MySQL 8.0.45) is generally available
• The current latest built-in Aurora MySQL 3.x constant is VER_3_12_0.

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

AWS CDK Library version (aws-cdk-lib)

Current main branch as of September 1, 2026.

AWS CDK CLI version

N/A — API constant request.

Environment details (OS name and version, etc.)

N/A — API constant request.