feat(bootstrap): delete noncurrent versions after 30 days (#31949)

CDK assets in the bootstrap bucket are content-addressed and immutable so we never naturally create noncurrent versions.
However, with the introduction of the `cdk gc` command, we now have the capacity to delete unused objects in the bucket. Because the bucket is versioned by default, the delete command [actually](https://docs.aws.amazon.com/AmazonS3/latest/userguide/DeletingObjectVersions.html) just replaces the object with a new dummy version (thus the deleted object becomes noncurrent). 

Now that noncurrent objects _can_ happen, if one utilizes `cdk gc`, we are updating the bootstrap template to retain them for 30 days rather than 365 days.

Update to bootstrap version 24 to use this new lifecycle policy in conjunction with `cdk gc`. 

----

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

Author: kaizencc

packages/aws-cdk/lib/api/bootstrap/bootstrap-template.yaml

@@ -207,11 +207,11 @@ Resources:
         Status: Enabled
       LifecycleConfiguration:
         Rules:
-          # Exising objects will never be overwritten but Security Hub wants this rule to exist
+          # Objects will only be noncurrent if they are deleted via garbage collection.
           - Id: CleanupOldVersions
             Status: Enabled
             NoncurrentVersionExpiration:
-              NoncurrentDays: 365
+              NoncurrentDays: 30
     UpdateReplacePolicy: Retain
     DeletionPolicy: Retain
   StagingBucketPolicy:
@@ -653,7 +653,7 @@ Resources:
       Type: String
       Name:
         Fn::Sub: '/cdk-bootstrap/${Qualifier}/version'
-      Value: '23'
+      Value: '24'
 Outputs:
   BucketName:
     Description: The name of the S3 bucket owned by the CDK toolkit stack