### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

I have an application which uses SQS.
It works in production.
It has acceptance tests which were passing with localstack until very recently.

Now I see:

```
An error occurred (InvalidParameterValue) when calling the SendMessage operation: Value 0 for parameter DelaySeconds is invalid. Reason: The request include parameter that is not valid for this queue type.
```

Yes, delay `0` is being passed in to `send_message` but this used to work in both localstack and AWS.

https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/sqs.html#SQS.Client.send_message

> DelaySeconds (integer) --
The length of time, in seconds, for which to delay a specific message. Valid values: 0 to 900. 

### Expected Behavior

DelaySeconds 0 is a valid value.

sqs send_message works when explicitly setting delay 0.

### 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 localstack/localstack

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

1. Create a SQS FIFO queue.
2. Try to `send_message`, specifying `DelaySeconds=0`

### Environment

```markdown
- OS: macos
- LocalStack: latest
```


### Anything else?

I notice on a recent issue that @thrau said he recently changed how SQS attribute values are validated.
import json
import os
import re
import time
from threading import Timer
import pytest
import requests
from botocore.exceptions import ClientError
from localstack import config
from localstack.aws.accounts import get_aws_account_id
from localstack.utils.aws import aws_stack
from localstack.utils.common import poll_condition, retry, short_uid, to_str
from .awslambda.functions import lambda_integration
from .awslambda.test_lambda import LAMBDA_RUNTIME_PYTHON36, TEST_LAMBDA_LIBS, TEST_LAMBDA_PYTHON
TEST_POLICY = """
{