### 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_
self, context: RequestContext, update_table_input: UpdateTableInput
    ) -> UpdateTableOutput:
        try:
            
            result = self.forward_request(context)
        except CommonServiceException as e:
            is_no_update_error = (
                e.code == "ValidationException" and "Nothing to update" in e.message
            )
            if not is_no_update_error or not list(
                {"TableClass", "ReplicaUpdates"} & set(update_table_input.keys())
            ):
                raise
            table_name = update_table_input.get("TableName")
            if update_table_input.get("TableClass"):
                table_definitions = get_store(context).table_definitions.setdefault(table_name, {})
                table_definitions["TableClass"] = update_table_input.get("TableClass")
            if update_table_input.get("ReplicaUpdates"):
                
                table_properties: Dict = get_store(context).REPLICA_UPDATES
                table_properties[table_name] = table_replicas = (
                    table_properties.get(table_name) or {}
                )
                
                original_region = context.region
                table_replicas[original_region] = region_replicas = (
                    table_replicas.get(original_region) or set()
                )
                for repl_update in update_table_input["ReplicaUpdates"]:
                    for key, details in repl_update.items():