### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

When folder names contain a space then `listObjects` returns names without `/` at the end. Without space it works fine.

### Expected Behavior

Folders containing space in the name are returned with `/` at the end.

### How are you starting LocalStack?

With a `docker run` command

### Steps To Reproduce

awslocal s3api put-object --bucket bucket-name --key "folder name/"

awslocal s3api list-objects --bucket bucket-name
```
{
    "Contents": [
        {
            "Key": "folder name",
            "LastModified": "2023-12-11T10:15:20.000Z",
            "ETag": "\"d41d8cd98f00b204e9800998ecf8427e\"",
            "Size": 0,
            "StorageClass": "STANDARD",
            "Owner": {
                "DisplayName": "webfile",
                "ID": "75aa57f09aa0c8caeab4f8c24e99d10f8e7faeebf76c078efc7c6caea54ba06a"
            }
        }
    ],
    "RequestCharged": null
}
```


### Environment

```markdown
- OS: Linux Mint 21.2
- LocalStack: localstack/localstack:3.0
```


### Anything else?

_No response_
if part_number < parts and ((len_data := len(part_data)) < 5_242_880):
                
                multiple = 5_242_880 // len_data
                part_data = part_data * (multiple + 1)
            part_data = to_bytes(part_data)
            upload_file_ = BytesIO(part_data)
            if zipped:
                upload_file_ = BytesIO()
                with gzip.GzipFile(fileobj=upload_file_, mode="w") as filestream:
                    filestream.write(part_data)
            response = aws_client.s3.upload_part(
                Bucket=bucket,
                Key=key,
                Body=upload_file_,
                PartNumber=part_number,
                UploadId=upload_id,
            )
            multipart_upload_parts.append({"ETag": response["ETag"], "PartNumber": part_number})
            
            if zipped:
                break
        return aws_client.s3.complete_multipart_upload(
            Bucket=bucket,
            Key=key,
            MultipartUpload={"Parts": multipart_upload_parts},
            UploadId=upload_id,
        )
    return perform_multipart_upload
@pytest.fixture
def s3_multipart_upload_with_snapshot(aws_client, snapshot):