### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

DynamoDB does not correctly namespace resources based on region and account ID. 

For instance, using the same table name across accounts and regions throws an error.

### Expected Behavior

It must be possible to create resources with same name on different regions and/or different accounts.

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

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

```
  $ AWS_ACCESS_KEY_ID=445500880268 AWS_DEFAULT_REGION=eu-central-1 \
    awslocal dynamodb create-table --table-name CertificateTargets-local1 \
        --key-schema AttributeName=target_uuid,KeyType=HASH \
        --attribute-definitions AttributeName=target_uuid,AttributeType=S \
        --provisioned-throughput ReadCapacityUnits=1000,WriteCapacityUnits=1000

  $ AWS_ACCESS_KEY_ID=445500880268 AWS_DEFAULT_REGION=us-east-1 \
    awslocal dynamodb create-table --table-name CertificateTargets-local1 \
        --key-schema AttributeName=target_uuid,KeyType=HASH \
        --attribute-definitions AttributeName=target_uuid,AttributeType=S \
        --provisioned-throughput ReadCapacityUnits=1000,WriteCapacityUnits=1000

    # ResourceInUseException!

  $ AWS_ACCESS_KEY_ID=000000000000 \
    awslocal dynamodb create-table --table-name CertificateTargets-local1 \
        --key-schema AttributeName=target_uuid,KeyType=HASH \
        --attribute-definitions AttributeName=target_uuid,AttributeType=S \
        --provisioned-throughput ReadCapacityUnits=1000,WriteCapacityUnits=1000

    # ResourceInUseException!
```

### Environment

```markdown
OS: Ubuntu 22.04
LocalStack: latest
```


### Anything else?

_No response_
return self.forward_request(context)
    @handler("BatchWriteItem", expand=False)
    def batch_write_item(
        self,
        context: RequestContext,
        batch_write_item_input: BatchWriteItemInput,
    ) -> BatchWriteItemOutput:
        existing_items = []
        unprocessed_put_items = []
        unprocessed_delete_items = []
        request_items = batch_write_item_input["RequestItems"]
        for table_name in sorted(request_items.keys()):
            for request in request_items[table_name]:
                for key in ["PutRequest", "DeleteRequest"]:
                    inner_request = request.get(key)
                    if inner_request:
                        if self.should_throttle("BatchWriteItem"):
                            if key == "PutRequest":
                                unprocessed_put_items.append(inner_request)
                            elif key == "DeleteRequest":
                                unprocessed_delete_items.append(inner_request)
                        else:
                            item = ItemFinder.find_existing_item(inner_request, table_name)
                            existing_items.append(item)
        
        result = self.forward_request(context)
        
        request_items = batch_write_item_input["RequestItems"]
        records, unprocessed_items = self.prepare_batch_write_item_records(
            request_items=request_items,