feat(rds): configure autoMinorVersionUpgrade for a database cluster (…

…#31962)

### Issue # (if applicable)

None

### Reason for this change

We can configure `autoMinorVersionUpgrade' for a database cluster, but AWS CDK cannot do this.

### Description of changes

Add `autoMinorVersionUpgrade` to `DatabaseClusterBaseProps`.

### Description of how you validated changes

Add both unit and integ tests.

### 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*

packages/@aws-cdk-testing/framework-integ/test/aws-rds/test/integ.cluster.js.snapshot/aws-cdk-rds-integ-with-feature-flag.template.json

@@ -495,6 +495,7 @@
   "DatabaseB269D8BB": {
    "Type": "AWS::RDS::DBCluster",
    "Properties": {
+    "AutoMinorVersionUpgrade": false,
     "CopyTagsToSnapshot": true,
     "DBClusterParameterGroupName": {
      "Ref": "ParamsA8366201"

packages/@aws-cdk-testing/framework-integ/test/aws-rds/test/integ.cluster.js.snapshot/aws-cdk-rds-integ.template.json

@@ -495,6 +495,7 @@
   "DatabaseB269D8BB": {
    "Type": "AWS::RDS::DBCluster",
    "Properties": {
+    "AutoMinorVersionUpgrade": false,
     "CopyTagsToSnapshot": true,
     "DBClusterParameterGroupName": {
      "Ref": "ParamsA8366201"