### 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_
req_path = f"/{req_path}" if not req_path.startswith("/") else req_path
        url = f"{self.get_forward_url()}/shell{req_path}"
        result = requests.request(
            method=request.method, url=url, headers=request.headers, data=request.data
        )
        return Response(result.content, headers=dict(result.headers), status=result.status_code)
    @handler("CreateTable", expand=False)
    def create_table(
        self,
        context: RequestContext,
        create_table_input: CreateTableInput,
    ) -> CreateTableOutput:
        
        table_name = create_table_input["TableName"]
        if self.table_exists(table_name):
            raise ResourceInUseException(f"Table already exists: {table_name}")
        billing_mode = create_table_input.get("BillingMode")
        provisioned_throughput = create_table_input.get("ProvisionedThroughput")
        if billing_mode == BillingMode.PAY_PER_REQUEST and provisioned_throughput is not None:
            raise ValidationException(
                "One or more parameter values were invalid: Neither ReadCapacityUnits nor WriteCapacityUnits can be "
                "specified when BillingMode is PAY_PER_REQUEST"
            )