### 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_
OPENSEARCH_ENDPOINT_STRATEGY = (
    os.environ.get("OPENSEARCH_ENDPOINT_STRATEGY", "").strip()
    or os.environ.get("ES_ENDPOINT_STRATEGY", "").strip()
    or "domain"
)
if OPENSEARCH_ENDPOINT_STRATEGY == "off":
    OPENSEARCH_ENDPOINT_STRATEGY = "port"
OPENSEARCH_MULTI_CLUSTER = is_env_not_false("OPENSEARCH_MULTI_CLUSTER") or is_env_true(
    "ES_MULTI_CLUSTER"
)
CONFIG_ENV_VARS = [
    "BUCKET_MARKER_LOCAL",
    "DEBUG",
    "DEFAULT_REGION",
    "DEVELOP",
    "DEVELOP_PORT",
    "DISABLE_CORS_CHECKS",
    "DISABLE_CUSTOM_CORS_APIGATEWAY",
    "DISABLE_CUSTOM_CORS_S3",
    "DISABLE_EVENTS",
    "DOCKER_BRIDGE_IP",
    "DYNAMODB_ERROR_PROBABILITY",
    "DYNAMODB_HEAP_SIZE",
    "DYNAMODB_READ_ERROR_PROBABILITY",
    "DYNAMODB_WRITE_ERROR_PROBABILITY",
    "EAGER_SERVICE_LOADING",
    "EDGE_BIND_HOST",
    "EDGE_FORWARD_URL",
    "EDGE_PORT",
    "EDGE_PORT_HTTP",