### 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_
return "%s:%s" % (self.region, self.prefix)
PREDEFINED_ENVIRONMENTS = {ENV_DEV: Environment(region=REGION_LOCAL, prefix=ENV_DEV)}
def get_environment(env=None, region_name=None):
    """
    Return an Environment object based on the input arguments.
    Parameter `env` can be either of:
        * None (or empty), in which case the rules below are applied to (env = os.environ['ENV'] or ENV_DEV)
        * an Environment object (then this object is returned)
        * a string '<region>:<name>', which corresponds to Environment(region='<region>', prefix='<prefix>')
        * the predefined string 'dev' (ENV_DEV), which implies Environment(region='local', prefix='dev')
        * a string '<name>', which implies Environment(region=DEFAULT_REGION, prefix='<name>')
    Additionally, parameter `region_name` can be used to override DEFAULT_REGION.
    """
    if not env:
        if "ENV" in os.environ:
            env = os.environ["ENV"]
        else:
            env = ENV_DEV
    elif not is_string(env) and not isinstance(env, Environment):
        raise Exception("Invalid environment: %s" % env)
    if is_string(env):
        env = Environment.from_string(env)
    if region_name:
        env.region = region_name
    if not env.region:
        raise Exception('Invalid region in environment: "%s"' % env)
    return env
def is_local_env(env):
    return not env or env.region == REGION_LOCAL or env.prefix == ENV_DEV
class Boto3Session(boto3.session.Session):