### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

Starting localstack with the CLI `PROVIDER_OVERRIDE_SQS=asf bin/localstack --debug start` starts up correctly but then uses the `default` SQS provider.

### Expected Behavior

I would expect it to start the asf provider.

### How are you starting LocalStack?

With the `localstack` script

### Steps To Reproduce

* `PROVIDER_OVERRIDE_SQS=asf bin/localstack --debug start`
* `awslocal sqs create-queue --queue-name "test-queue"`

logs show:

```
2021-12-27T14:08:43.274:DEBUG:plugin.manager: instantiating plugin PluginSpec(localstack.aws.provider.sqs:default = <function sqs at 0x7f30e6d2b820>)
2021-12-27T14:08:43.274:DEBUG:plugin.manager: loading plugin localstack.aws.provider:sqs:default
2021-12-27T14:08:43.278:INFO:localstack.services.infra: Starting mock SQS service on http port 4566 ...
2021-12-27T14:08:43.279:INFO:localstack.services.infra: Starting mock SQS service on http port 4566 ...
2021-12-27T14:08:43.279:INFO:localstack.services.motoserver: starting moto server on http://0.0.0.0:38335
```

### Environment

```markdown
- OS: Ubuntu 20.04
- LocalStack: 13.2
```


### Anything else?

_No response_
DOCKER_HOST_FROM_CONTAINER = DOCKER_BRIDGE_IP
    if not is_in_docker and not is_in_linux:
        
        
        if LOCALSTACK_HOSTNAME == LOCALHOST:
            DOCKER_HOST_FROM_CONTAINER = "host.docker.internal"
    
    if is_in_docker:
        DOCKER_HOST_FROM_CONTAINER = socket.gethostbyname("host.docker.internal")
        if LOCALSTACK_HOSTNAME == DOCKER_BRIDGE_IP:
            LOCALSTACK_HOSTNAME = DOCKER_HOST_FROM_CONTAINER
except socket.error:
    pass
if is_in_docker and not os.environ.get("LAMBDA_REMOTE_DOCKER", "").strip():
    LAMBDA_REMOTE_DOCKER = True
LAMBDA_STAY_OPEN_MODE = is_in_docker and is_env_not_false("LAMBDA_STAY_OPEN_MODE")
no_proxy = ",".join(set((LOCALSTACK_HOSTNAME, LOCALHOST, LOCALHOST_IP, "[::1]")))
if os.environ.get("no_proxy"):
    os.environ["no_proxy"] += "," + no_proxy
elif os.environ.get("NO_PROXY"):
    os.environ["NO_PROXY"] += "," + no_proxy
else:
    os.environ["no_proxy"] = no_proxy
CLI_COMMANDS = {}
VALID_PARTITIONS = set(Session().get_available_partitions())
VALID_REGIONS = set()
for partition in VALID_PARTITIONS:
    for region in Session().get_available_regions("sns", partition):
        VALID_REGIONS.add(region)
def parse_service_ports() -> Dict[str, int]: