### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The provided example does not put a message in SQS.

### Expected Behavior

The provided example puts a message in SQS.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

The following scripts returns no items in SQS, but it should. The bit detail: foo is not matched.

```
awslocal events create-event-bus \
    --name detail-bus-1

awslocal sqs create-queue \
    --queue-name "detail-sqs-1"

awslocal events put-rule \
    --name "detail-rule-1" \
    --event-bus-name "detail-bus-1" \
    --event-pattern '{ "detail": { "foo": [ { "exists": true } ] } }'

awslocal events put-targets \
    --rule "detail-rule-1" \
    --event-bus-name "detail-bus-1" \
    --targets "Id"="detail-target-rule-1","Arn"="arn:aws:sqs:us-east-1:000000000000:detail-sqs-1","InputPath"="$.detail"

awslocal events put-events --entries '[{"DetailType": "test", "Source": "aws.test", "Detail": "{ \"foo\": \"bar\" }", "EventBusName": "detail-bus-1"}]'
awslocal sqs receive-message --queue-url http://localhost:4566/000000000000/detail-sqs-1
```

### Environment

```markdown
- OS: macOS 13.3.1
- LocalStack: 1.4.0
```


### Anything else?

_No response_
return events_stores[context.account_id][context.region]
    def test_event_pattern(
        self, context: RequestContext, event_pattern: EventPattern, event: String
    ) -> TestEventPatternResponse:
        
        
        
        
        evt_pattern = json.loads(str(event_pattern))
        evt = json.loads(str(event))
        if any(key not in evt or evt[key] not in values for key, values in evt_pattern.items()):
            return TestEventPatternResponse(Result=False)
        return TestEventPatternResponse(Result=True)
    @staticmethod
    def get_scheduled_rule_func(
        store: EventsStore,
        rule_name: RuleName,
        event_bus_name_or_arn: Optional[EventBusNameOrArn] = None,
    ):
        def func(*args, **kwargs):