chore(rds): Add support for RDS MySQL minor versions of 8.0.34 and 5.7.43 (#26699)

Add support for RDS MySQL minor versions of 8.0.34 and 5.7.43

https://aws.amazon.com/about-aws/whats-new/2023/08/amazon-rds-mysql-new-minor-versions/

https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/MySQL.Concepts.VersionMgmt.html

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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: bhanutejags

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

@@ -594,6 +594,8 @@ export class MysqlEngineVersion {
   public static readonly VER_5_7_41 = MysqlEngineVersion.of('5.7.41', '5.7');
   /** Version "5.7.42". */
   public static readonly VER_5_7_42 = MysqlEngineVersion.of('5.7.42', '5.7');
+  /** Version "5.7.43". */
+  public static readonly VER_5_7_43 = MysqlEngineVersion.of('5.7.43', '5.7');
 
   /** Version "8.0" (only a major version, without a specific minor version). */
   public static readonly VER_8_0 = MysqlEngineVersion.of('8.0', '8.0');
@@ -631,6 +633,8 @@ export class MysqlEngineVersion {
   public static readonly VER_8_0_32 = MysqlEngineVersion.of('8.0.32', '8.0');
   /** Version "8.0.33". */
   public static readonly VER_8_0_33 = MysqlEngineVersion.of('8.0.33', '8.0');
+  /** Version "8.0.34". */
+  public static readonly VER_8_0_34 = MysqlEngineVersion.of('8.0.34', '8.0');
 
   /**
    * Create a new MysqlEngineVersion with an arbitrary version.