### 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_
key_location_name = key_shape.serialization.get("name", "key")
        value_location_name = value_shape.serialization.get("name", "value")
        if shape.serialization.get("flattened") and not isinstance(node, list):
            node = [node]
        for keyval_node in node:
            key_name = val_name 
            for single_pair in keyval_node:
                # Within each <entry> there's a <key> and a <value>
                tag_name = self._node_tag(single_pair)
                if tag_name == key_location_name:
                    key_name = self._parse_shape(request, key_shape, single_pair, uri_params)
                elif tag_name == value_location_name:
                    val_name = self._parse_shape(request, value_shape, single_pair, uri_params)
                else:
                    raise ProtocolParserError("Unknown tag: %s" % tag_name)
            parsed[key_name] = val_name
        return parsed
    def _parse_list(
        self,
        requespRequest,
        shape: ListShape,
        node: dict,
        
    ) -> list:
        # When we use _build_name_to_xml_node, repeated elements are aggregated
        # into a list. However, we can't tell the difference between a scalar
        # value and a single element flattened list. So before calling the
        # real _hlist, we know that "node" should actually be a list if
        # it's flattened, and if it's not, then we make it a one element list.
        if shape.serialization.get("flattened") and not isinstance(node, list):