### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Localstack (1.0.2) returns what appears to be an incorrect error response when calling `get-object` against a non-existent bucket:

```
$ awslocal --debug s3api get-object --bucket=not-exists-2341234 --key=doesnt-matter.txt doesnt-matter.txt 2>&1 | grep Error | uniq
b"<?xml version='1.0' encoding='utf-8'?>\n<ErrorResponse><Error><Code>NoSuchBucket</Code><Message>The specified bucket does not exist</Message><Type>Sender</Type></Error><RequestId>3FA3WN14HJTCNKT0TFF6LIKTAUQ0XO3AB7MUCIQAIW8KST6T0BA1</RequestId></ErrorResponse>"
```

```
$ aws --debug s3api get-object --bucket=not-exists-2341234 --key=doesnt-matter.txt doesnt-matter.txt 2>&1 | grep Error | uniq
b'<?xml version="1.0" encoding="UTF-8"?>\n<Error><Code>NoSuchBucket</Code><Message>The specified bucket does not exist</Message><BucketName>not-exists-2341234</BucketName><RequestId>99NA328HYHDQH2VN</RequestId><HostId>Kp5IOfCoHrw8Hvo8VL+f994yByXJGECQ4Fy5eNoY/7MPpMcHz2QygoG23ILrmF1TkiYoR+k2Njg=</HostId></Error>'
```
Pretty-printing the XML makes the difference in behaviour clearer:

```xml
<ErrorResponse>
    <Error>
        <Code>NoSuchBucket</Code>
        <Message>The specified bucket does not exist</Message>
        <Type>Sender</Type>
    </Error>. 
    <RequestId>3FA3WN14HJTCNKT0TFF6LIKTAUQ0XO3AB7MUCIQAIW8KST6T0BA1</RequestId>
</ErrorResponse>
```

vs

```xml
<Error>
    <Code>NoSuchBucket</Code>
    <Message>The specified bucket does not exist</Message>
    <BucketName>not-exists-2341234</BucketName>
    <RequestId>99NA328HYHDQH2VN</RequestId>. 
    <HostId>Kp5IOfCoHrw8Hvo8VL+f994yByXJGECQ4Fy5eNoY/7MPpMcHz2QygoG23ILrmF1TkiYoR+k2Njg=</HostId>
</Error>
```

I've also observed the same behaviour when calling the `get-object` API from the Rust SDK.

The problem does not appear prior to version `1.0.0`.

### Expected Behavior

The returned error should have the format described in the spec:

https://docs.aws.amazon.com/AmazonS3/latest/API/ErrorResponses.html

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    docker run -p 4566:4566 localstack/localstack:1.0.2

#### Client commands (e.g., AWS SDK code snippet, or sequence of "awslocal" commands)

    awslocal --debug s3api get-object --bucket=not-exists-2341234 --key=doesnt-matter.txt doesnt-matter.txt 2>&1 | grep Error | uniq


### Environment

```markdown
- OS: OSX
- LocalStack: 1.0.2
```


### Anything else?

The same behaviour is observed on `1.0.0`. Reverting to `0.14.5` we see:

```xml
<Error>
    <Code>NoSuchBucket</Code>
    <Message>The specified bucket does not exist</Message>
    <BucketName></BucketName>
    <RequestID>7a62c49f-347e-4fc4-9331-6e8eEXAMPLE</RequestID>
</Error>
```

which is the correct behaviour.
"""
Response serializers for the different AWS service protocols.
The module contains classes that take a service's response dict, and
given an operation model, serialize the HTTP response according to the
specified output shape.
It can be seen as the counterpart to the ``parse`` module in ``botocore``
(which parses the result of these serializer). It has a lot of
similarities with the ``serialize`` module in ``botocore``, but
serves a different purpose (serializing responses instead of requests).
The different protocols have many similarities. The class hierarchy is
designed such that the serializers share as much logic as possible.
The class hierarchy looks as follows:
::
                                      ┌───────────────────┐
                                      │ResponseSerializer │
                                      └───────────────────┘
                                          ▲    ▲      ▲
                   ┌──────────────────────┘    │      └──────────────────┐
      ┌────────────┴────────────┐ ┌────────────┴─────────────┐ ┌─────────┴────────────┐
      │BaseXMLResponseSerializer│ │BaseRestResponseSerializer│ │JSONResponseSerializer│
      └─────────────────────────┘ └──────────────────────────┘ └──────────────────────┘
                         ▲    ▲             ▲             ▲              ▲
  ┌──────────────────────┴─┐ ┌┴─────────────┴──────────┐ ┌┴──────────────┴──────────┐
  │QueryResponseSerializer │ │RestXMLResponseSerializer│ │RestJSONResponseSerializer│
  └────────────────────────┘ └─────────────────────────┘ └──────────────────────────┘
              ▲
   ┌──────────┴──────────┐