chore(rds): add MySQL 5.7.35, 5.7.36, 5.7.37, 8.0.27, 8.0.28 versions (…

…aws#19613)

Supported versions taken from [documentation](https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/CHAP_MySQL.html#MySQL.Concepts.VersionMgmt)

----

### All Submissions:

* [x] Have you followed the guidelines in our [Contributing guide?](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md)

### Adding new Unconventional Dependencies:

* [ ] This PR adds new unconventional dependencies following the process described [here](https://github.com/aws/aws-cdk/blob/master/CONTRIBUTING.md/#adding-new-unconventional-dependencies)

### New Features

* [ ] Have you added the new feature to an [integration test](https://github.com/aws/aws-cdk/blob/master/INTEGRATION_TESTS.md)?
	* [ ] Did you use `cdk-integ` to deploy the infrastructure and generate the snapshot (i.e. `cdk-integ` without `--dry-run`)?

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

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

@@ -492,6 +492,12 @@ export class MysqlEngineVersion {
   public static readonly VER_5_7_33 = MysqlEngineVersion.of('5.7.33', '5.7');
   /** Version "5.7.34". */
   public static readonly VER_5_7_34 = MysqlEngineVersion.of('5.7.34', '5.7');
+  /** Version "5.7.35". */
+  public static readonly VER_5_7_35 = MysqlEngineVersion.of('5.7.35', '5.7');
+  /** Version "5.7.36". */
+  public static readonly VER_5_7_36 = MysqlEngineVersion.of('5.7.36', '5.7');
+  /** Version "5.7.37". */
+  public static readonly VER_5_7_37 = MysqlEngineVersion.of('5.7.37', '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');
@@ -517,6 +523,10 @@ export class MysqlEngineVersion {
   public static readonly VER_8_0_25 = MysqlEngineVersion.of('8.0.25', '8.0');
   /** Version "8.0.26". */
   public static readonly VER_8_0_26 = MysqlEngineVersion.of('8.0.26', '8.0');
+  /** Version "8.0.27". */
+  public static readonly VER_8_0_27 = MysqlEngineVersion.of('8.0.27', '8.0');
+  /** Version "8.0.28". */
+  public static readonly VER_8_0_28 = MysqlEngineVersion.of('8.0.28', '8.0');
 
   /**
    * Create a new MysqlEngineVersion with an arbitrary version.