generated content (using cdk synth) in cdk.out cannot be reused for deploying infrastructure in another region

### Describe the bug

generated content in cdk.out cannot be reused for deploying infrastructure in another region.


### Expected Behavior

With the generated content within cdk.out should be also possible to deploy the App (Intrastrukture) in another Region.

### Current Behavior

I have a simple Infrastrukture with nested stacks. Its deployment from console is possible, using cdk deploy.

I uploaded the content of cdk.out into a s3-bucket. This contains all files, template and assets.

From the AWS-Console in Cloud Formation (located in another region), I try to deploy/create a stack with the S3 URL of that template . But I get the error "S3 error: Access Denied For more information check http://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html".

The S3 bucket allows public access and the full content of cdk.out was uploaded in that bucket

### Reproduction Steps

Using the creation of a new stack from CloudFormation:

Try with the S3 URL of the bucket where is located the content of cdk.out.zip

[cdk.out.zip](https://github.com/aws/aws-cdk/files/12557836/cdk.out.zip)

### Possible Solution

_No response_

### Additional Information/Context

_No response_

### CDK CLI Version

aws-cli/2.13.12 Python/3.11.4 Windows/10 exe/AMD64 prompt/off

### Framework Version

_No response_

### Node.js Version

9.5.1

### OS

Windows

### Language

Java

### Language Version

Java 17

### Other information

_No response_

Start by inspecting the attached cdk.out.zip and reproducing the deployment from the S3 URL in the CloudFormation console in a different region. Compare that result with the working cdk deploy path and determine whether the generated template and assets can be consumed cross-region; done means the generated content deploys successfully in the target region.

Written by the indexing model from the issue text.