fix(bootstrap): add DeletionPolicy and UpdateReplacePolicy to FileAssetsBucketEncryptionKey (#100)

- add DeletionPolicy and UpdateReplacePolicy to
FileAssetsBucketEncryptionKey to follow best practice for stateful
resources
- bump bootstrap version

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

Co-authored-by: Momo Kornher <[email protected]>

Author: gracelu0

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

@@ -166,6 +166,8 @@ Resources:
                 Fn::Sub: "${FilePublishingRole.Arn}"
             Resource: "*"
     Condition: CreateNewKey
+    UpdateReplacePolicy: Delete
+    DeletionPolicy: Delete
   FileAssetsBucketEncryptionKeyAlias:
     Condition: CreateNewKey
     Type: AWS::KMS::Alias
@@ -657,7 +659,7 @@ Resources:
       Type: String
       Name:
         Fn::Sub: '/cdk-bootstrap/${Qualifier}/version'
-      Value: '25'
+      Value: '26'
 Outputs:
   BucketName:
     Description: The name of the S3 bucket owned by the CDK toolkit stack