### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

The documentation states that when setting DYNAMODB_SHARE_DB=1 DynamodDB will use a single database for each credential and region. This doesn't work when LocalStack is started from CLI. For example:

`DYNAMODB_SHARE_DB=1 localstack start -d`

In Docker logs you can find:
INFO:localstack.services.dynamodb.server: SharedDb:     false

At least it seems that the environment variable is missing from CONFIG_ENV_VARS which is used for passing the environment variables to container.

Tried the following fix and at least after brief testing it solves the issue:
https://github.com/jvuori/localstack/commit/6bb4a3c68c8675b9548e0f5eb8028397d9ee5a47
Feel free to pull if the fix is appropriate. (Sorry, no unit test...)

### Expected Behavior

`DYNAMODB_SHARE_DB=1 localstack start -d`
should start DynamoDB with:

INFO:localstack.services.dynamodb.server: SharedDb:     true

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

DYNAMODB_SHARE_DB=1 localstack start -d


### Environment

```markdown
- OS: Windows + WSL2 + Docker CE running inside WSL2
- LocalStack: 0.14.1
```


### Anything else?

_No response_
)
EXTERNAL_SERVICE_PORTS_END = int(
    os.environ.get("EXTERNAL_SERVICE_PORTS_END")
    or os.environ.get("SERVICE_INSTANCES_PORTS_END")
    or (EXTERNAL_SERVICE_PORTS_START + 50)
)
LAMBDA_JAVA_OPTS = os.environ.get("LAMBDA_JAVA_OPTS", "").strip()
KINESIS_SHARD_LIMIT = os.environ.get("KINESIS_SHARD_LIMIT", "").strip() or "100"
KINESIS_LATENCY = os.environ.get("KINESIS_LATENCY", "").strip() or "500"
KINESIS_PROVIDER = os.environ.get("KINESIS_PROVIDER") or "kinesis-mock"
SYNCHRONOUS_SNS_EVENTS = is_env_true("SYNCHRONOUS_SNS_EVENTS")
SYNCHRONOUS_SQS_EVENTS = is_env_true("SYNCHRONOUS_SQS_EVENTS")
SYNCHRONOUS_API_GATEWAY_EVENTS = is_env_not_false("SYNCHRONOUS_API_GATEWAY_EVENTS")
SYNCHRONOUS_KINESIS_EVENTS = is_env_not_false("SYNCHRONOUS_KINESIS_EVENTS")
SYNCHRONOUS_DYNAMODB_EVENTS = is_env_not_false("SYNCHRONOUS_DYNAMODB_EVENTS")
KINESIS_ERROR_PROBABILITY = float(os.environ.get("KINESIS_ERROR_PROBABILITY", "").strip() or 0.0)
DYNAMODB_ERROR_PROBABILITY = float(os.environ.get("DYNAMODB_ERROR_PROBABILITY", "").strip() or 0.0)
DYNAMODB_READ_ERROR_PROBABILITY = float(
    os.environ.get("DYNAMODB_READ_ERROR_PROBABILITY", "").strip() or 0.0
)
DYNAMODB_WRITE_ERROR_PROBABILITY = float(
    os.environ.get("DYNAMODB_WRITE_ERROR_PROBABILITY", "").strip() or 0.0
)
DYNAMODB_HEAP_SIZE = os.environ.get("DYNAMODB_HEAP_SIZE", "").strip() or "256m"
SQS_PORT_EXTERNAL = int(os.environ.get("SQS_PORT_EXTERNAL") or 0)
HOSTNAME_FROM_LAMBDA = os.environ.get("HOSTNAME_FROM_LAMBDA", "").strip()
LAMBDA_REMOTE_DOCKER = is_env_true("LAMBDA_REMOTE_DOCKER")
if is_in_docker and not os.environ.get("LAMBDA_REMOTE_DOCKER", "").strip():
    LAMBDA_REMOTE_DOCKER = True
BUCKET_MARKER_LOCAL = (