### 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_
def __init__(self, region=None, prefix=None):
        
        
        self.region = region or get_local_region()
        
        self.prefix = prefix
    def apply_json(self, j):
        if isinstance(j, str):
            j = json.loads(j)
        self.__dict__.update(j)
    @staticmethod
    def from_string(s):
        parts = s.split(":")
        if len(parts) == 1:
            if s in PREDEFINED_ENVIRONMENTS:
                return PREDEFINED_ENVIRONMENTS[s]
            parts = [get_local_region(), s]
        if len(parts) > 2:
            raise Exception('Invalid environment string "%s"' % s)
        region = parts[0]
        prefix = parts[1]
        return Environment(region=region, prefix=prefix)
    @staticmethod
    def from_json(j):
        if not isinstance(j, dict):
            j = j.to_dict()
        result = Environment()
        result.apply_json(j)
        return result
    def __str__(self):