system test com_templates webservices

[alikon]

Summary of Changes

API tests for following endpoints:

• GET: /api/index.php/v1/templates/styles/site
• GET: /api/index.php/v1/templates/styles/site/{id}
• PATCH: /api/index.php/v1/templates/styles/site/{id}

[HLeithner]

That silent error seems wrong to me, we shouldn't ignore modification requests without noticed, actually the exception is right from my point of view. the patch request shouldn't include a the template in the first place

[alikon]

the problem is that even if you don't include template in the payload of the PATCH request
as per https://github.com/joomla/joomla-cms/blob/4.4-dev/libraries/src/MVC/Controller/ApiController.php#L397-L406
it's included as well, there are some keys like template and or password that for PATCH needs some extra management
done in the preprocessSaveData