Add aux_tags suboption for tags in tag_group module

[meni2029]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

The aux_tags suboption for the tags in the tag_group module is not available, while it was possible to declare it in previous collection version (i.e. 3.4.0).

What is the new behavior?

• Added the aux_tags suboption for the tags in the tag_group module
• The suboption is optional and default value is an empty list ([])
• The aux_tags is now used in the changes_detected function

Other information

It has been tested on Checkmk 2.3.0p27. It might not fully work with 2.2 as, if I remember correctly, the API returns no "aux_tags" item if there's none selected. At least in 2.3, the API always returns it with empty list if none selected, so default => []:

"topic": "Notifications",
    "tags": [
        {
            "id": "yes",
            "title": "of course",
            "aux_tags": []
        }

[robin-checkmk]

Hi @meni2029 and thank you for your contribution! Looks good to me so far.
Do you think you can add one or two integration tests, which verify that the feature works as intended?
That would be highly appreciated! If not, I can take care of it as well.

[meni2029]

Hi @robin-checkmk
Thanks for your reply. I will have a look at the integration tests.

[meni2029]

Hi @robin-checkmk ,
I added integration tests. For the tests I create the aux_tags with direct API call, as there's no module for aux_tags.
Hopefully this is ok.
Cheers