### 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,
        table_name: TableName,
        time_to_live_specification: TimeToLiveSpecification,
    ) -> UpdateTimeToLiveOutput:
        
        backend = get_store(context)
        backend.ttl_specifications[table_name] = time_to_live_specification
        return UpdateTimeToLiveOutput(TimeToLiveSpecification=time_to_live_specification)
    def create_global_table(
        self, context: RequestContext, global_table_name: TableName, replication_group: ReplicaList
    ) -> CreateGlobalTableOutput:
        global_tables: Dict = get_store(context).GLOBAL_TABLES
        if global_table_name in global_tables:
            raise GlobalTableAlreadyExistsException("Global table with this name already exists")
        replication_group = [grp.copy() for grp in replication_group or []]
        data = {"GlobalTableName": global_table_name, "ReplicationGroup": replication_group}
        global_tables[global_table_name] = data
        for group in replication_group:
            group["ReplicaStatus"] = "ACTIVE"
            group["ReplicaStatusDescription"] = "Replica active"
        return CreateGlobalTableOutput(GlobalTableDescription=data)
    def describe_global_table(