### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Command `localstack update all` should ignore the dangling `localstack/localstack:<none>` images in the `docker images` list. 
I.e, images with tag `<none>`.

![image](https://user-images.githubusercontent.com/97876429/201023229-d9e9548f-8de0-4c25-a28e-bbf6eabf557b.png)


### 🧑‍💻 Implementation

_No response_

### Anything else?

_No response_
from localstack_ext import config as ext_config
    assert config
    assert ext_config
    if format == "table":
        print_config_table()
    elif format == "plain":
        print_config_pairs()
    elif format == "dict":
        print_config_dict()
    elif format == "json":
        print_config_json()
    else:
        print_config_pairs()  
def print_config_json():