### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The format of the message received when using an SNS topic as a lambda DLQ diverges from AWS'.
What is missing is the whole event as received by the lambda to be passed as the `Message` field of the SNS message, and not only the `Message` sent to the lambda. 
Current response from Localstack using snapshot mechanism:

```json
{
  "Body": {
    "Message": {
      "raise_error": 1
    },
    "MessageAttributes": {
      "ErrorCode": {
        "Type": "String",
        "Value": "200"
      },
      "ErrorMessage": {
        "Type": "String",
        "Value": "Lambda process returned with error. Result: {\"errorType\":\"Exception\",\"errorMessage\":\"Test exception (this is intentional)\",\"stackTrace\":[\"  File \\\"/var/task/handler.py\\\", line 126, in handler\\n    raise Exception(\\\"Test exception (this is intentional)\\\")\\n\"]}. Output:\n[32mSTART RequestId: 0bf50aba-256b-11b8-8e3a-93690a4d8bcc Version: $LATEST[0m\nLambda log message - print function\n[INFO]\t2022-08-08T13:36:16.615Z\t0bf50aba-256b-11b8-8e3a-93690a4d8bcc\tLambda log message - logging module\n\n[ERROR] Exception: Test exception (this is intentional)\nTraceback (most recent call last):\n\u00a0\u00a0File \"/var/task/handler.py\", line 126, in handler\n\u00a0\u00a0\u00a0\u00a0raise Exception(\"Test exception (this is intentional)\")\n[32mEND RequestId: 0bf50aba-256b-11b8-8e3a-93690a4d8bcc[0m\n[32mREPORT RequestId: 0bf50aba-256b-11b8-8e3a-93690a4d8bcc\tInit Duration: 361.22 ms\tDuration: 6.06 ms\tBilled Duration: 7 ms\tMemory Size: 1536 MB\tMax Memory Used: 35 MB\t[0m"
      },
      "RequestID": {
        "Type": "String",
        "Value": "<request-id:1>"
      }
    },
    "MessageId": "<uuid:1>",
    "Signature": "<signature>",
    "SignatureVersion": "1",
    "SigningCertURL": "https://sns.<region>.amazonaws.com/SimpleNotificationService-<signing-cert-file:1>",
    "Timestamp": "date",
    "TopicArn": "arn:aws:sns:<region>:111111111111:<resource:1>",
    "Type": "Notification",
    "UnsubscribeURL": "<unsubscribe-domain>/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:<region>:111111111111:<resource:1>:<resource:2>"
  },
  "MD5OfBody": "<md5-hash>",
  "MessageId": "<uuid:2>",
  "ReceiptHandle": "<receipt-handle:1>"
}
 ```

### Expected Behavior

Example message from AWS using the snapshot mechanism:
```json
{
  "Body": {
    "Message": {
      "Records": [
        {
          "EventSource": "aws:sns",
          "EventSubscriptionArn": "arn:aws:sns:<region>:111111111111:<resource:4>:<resource:1>",
          "EventVersion": "1.0",
          "Sns": {
            "Message": {
              "raise_error": 1
            },
            "MessageAttributes": {},
            "MessageId": "<uuid:1>",
            "Signature": "<signature>",
            "SignatureVersion": "1",
            "SigningCertUrl": "https://sns.<region>.amazonaws.com/SimpleNotificationService-<signing-cert-file:1>",
            "Subject": null,
            "Timestamp": "date",
            "TopicArn": "arn:aws:sns:<region>:111111111111:<resource:4>",
            "Type": "Notification",
            "UnsubscribeUrl": "<unsubscribe-domain>/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:<region>:111111111111:<resource:4>:<resource:1>"
          }
        }
      ]
    },
    "MessageAttributes": {
      "ErrorCode": {
        "Type": "Number",
        "Value": "200"
      },
      "ErrorMessage": {
        "Type": "String",
        "Value": "Test exception (this is intentional)"
      },
      "RequestID": {
        "Type": "String",
        "Value": "<request-id:1>"
      }
    },
    "MessageId": "<uuid:2>",
    "Signature": "<signature>",
    "SignatureVersion": "1",
    "SigningCertURL": "https://sns.<region>.amazonaws.com/SimpleNotificationService-<signing-cert-file:1>",
    "Timestamp": "date",
    "TopicArn": "arn:aws:sns:<region>:111111111111:<resource:3>",
    "Type": "Notification",
    "UnsubscribeURL": "<unsubscribe-domain>/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:<region>:111111111111:<resource:3>:<resource:2>"
  },
  "MD5OfBody": "<md5-hash>",
  "MessageId": "<uuid:3>",
  "ReceiptHandle": "<receipt-handle:1>"
}
```

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

Run the SNS test `tests.integration.test_sns.TestSNSProvider.test_sns_topic_as_lambda_dead_letter_queue`, the scenario is already reproduced. 

### Environment

```markdown
- OS: macOS Monterey 12.5
- LocalStack: latest (1.0.4dev)
```


### Anything else?

_No response_
PublishBatchResponse,
    PublishResponse,
    SetSMSAttributesResponse,
    SnsApi,
    String,
    SubscribeResponse,
    SubscriptionAttributesMap,
    TagKeyList,
    TagList,
    TagResourceResponse,
    TooManyEntriesInBatchRequestException,
    TopicAttributesMap,
    UntagResourceResponse,
    VerifySMSSandboxPhoneNumberResult,
    attributeName,
    attributeValue,
    authenticateOnUnsubscribe,
    boolean,
    endpoint,
    label,
    message,
    messageStructure,
    nextToken,
    protocol,
    string,
    subject,
    subscriptionARN,
    token,
    topicARN,
    topicName,