### 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_
#
        
        #
        account_id1 = "420420420420"
        account_id2 = "133713371337"
        
        acm_client1 = client_factory("acm", account_id1)
        acm_client2 = client_factory("acm", account_id2)
        acm_client1.request_certificate(DomainName="example.com")
        certs = acm_client1.list_certificates()
        assert len(certs["CertificateSummaryList"]) == 1
        certs = acm_client2.list_certificates()
        assert len(certs["CertificateSummaryList"]) == 0
        #
        
        #
        ec2_client1 = client_factory("ec2", account_id1)
        ec2_client2 = client_factory("ec2", account_id2)
        
        ec2_client1.create_key_pair(KeyName="lorem")
        pairs = ec2_client1.describe_key_pairs()
        assert len(pairs["KeyPairs"]) == 1
        pairs = ec2_client2.describe_key_pairs()
        assert len(pairs["KeyPairs"]) == 0
        
        ec2_client2.create_key_pair(KeyName="lorem")
        ec2_client2.create_key_pair(KeyName="ipsum")
        pairs = ec2_client2.describe_key_pairs()
        assert len(pairs["KeyPairs"]) == 2
        pairs = ec2_client1.describe_key_pairs()