### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

when executing the commands from this issue
* #5293

specifically the last command: 

    aws --debug --endpoint-url="http://localhost:4566" sqs change-message-visibility --queue-url http://localhost:4566/000000000000/MyQueue --receipt-handle garbage --visibility-timeout 30

i get the following XML response:
```xml
<ErrorResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/"><Error><Code>ReceiptHandleIsInvalid</Code><Message>The input receipt handle "garbage" is not a valid receipt handle.</Message></Error><RequestId>RC7Q6J8V0LJ4EN2WQXGANXA2XWRL13D4GN6NVJF1V8UFBAVEO417</RequestId></ErrorResponse>
```
and the following headers:
```python
{
    'Content-Type': 'text/plain; charset=utf-8',
    'Content-Length': '309',
    'Access-Control-Allow-Origin': '*',
    'Access-Control-Allow-Methods': 'HEAD,GET,PUT,POST,DELETE,OPTIONS,PATCH',
    'Access-Control-Allow-Headers': 'authorization,cache-control,content-length,content-md5,content-type,etag,location,x-amz-acl,x-amz-content-sha256,x-amz-date,x-amz-request-id,x-amz-security-token,x-amz-tagging,x-amz-target,x-amz-user-agent,x-amz-version-id,x-amzn-requestid,x-localstack-target,amz-sdk-invocation-id,amz-sdk-request',
    'Access-Control-Expose-Headers': 'etag,x-amz-version-id',
    'Connection': 'close',
    'date': 'Tue, 18 Jan 2022 23:17:17 GMT',
    'server': 'hypercorn-h11',
}

```

this XML has three issues:
1. there's no `<?xml` start declaration
2. the message content is not HTML encoded (`"` should be `&quot;`)
3. the content type is `text/plain`

### Expected Behavior

The XML returned by AWS looks as follows:
```xml
<?xml version="1.0"?><ErrorResponse xmlns="http://queue.amazonaws.com/doc/2012-11-05/"><Error><Type>Sender</Type><Code>ReceiptHandleIsInvalid</Code><Message>The input receipt handle &quot;garbage&quot; is not a valid receipt handle.</Message><Detail/></Error><RequestId>bd34a56b-d17a-552a-b343-ff0b22169609</RequestId></ErrorResponse>
```
with the following response headers:
```python
{
    'x-amzn-RequestId': '3e3ad214-7356-536b-8342-88753f3af4f7',
    'Date': 'Tue, 18 Jan 2022 23:15:56 GMT',
    'Content-Type': 'text/xml',
    'Content-Length': '334',
}
```

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

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

    PROVIDER_OVERRIDE_SQS=asf DEBUG=1 python -m localstack.cli.main start --host

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

```
aws --endpoint-url="http://localhost:4566" sqs create-queue --queue-name MyQueue
aws --debug --endpoint-url="http://localhost:4566" sqs change-message-visibility --queue-url http://localhost:4566/000000000000/MyQueue --receipt-handle garbage --visibility-timeout 30
```

### Environment

```markdown
- OS: Linux Mint 20
- LocalStack: latest
```

### Anything else?

Not sure this is really the root cause of #5293, but worth investigating and fixing regardless.
"InstanceIds": [
                    "string",
                ],
                "Tags": [
                    {"Key": "string", "Value": "string"},
                ],
                "DedicatedHostIds": [
                    "string",
                ],
            },
            "State": "creating",
            "Tags": [
                {"Key": "string", "Value": "string"},
            ],
        }
    }
    _botocore_serializer_integration_test("ec2", "CreateInstanceEventWindow", parameters)
def test_ec2_protocol_custom_error_serialization():
    exception = CommonServiceException(
        "IdempotentParameterMismatch", "Different payload, same token?!"
    )
    _botocore_error_serializer_integration_test(
        "ec2",
        "StartInstances",
        exception,
        "IdempotentParameterMismatch",
        400,
        "Different payload, same token?!",
    )