Move private appIDs support from AWH (web) to AH (network)

[JustArchi]

Checklist

• [X] I read and understood ASF's Contributing guidelines
• [X] I also read Setting-up and FAQ, I don't need help, this is an enhancement idea
• [X] This is not a duplicate of an existing issue
• [X] My idea doesn't duplicate existing ASF functionality described on the wiki
• [X] I believe that my idea falls into ASF's scope and should be offered as part of ASF built-in functionality
• [X] My idea doesn't violate the Steam Subscriber Agreement
• [X] My idea doesn't violate the Steam Online Conduct
• [X] This is not ASF-ui suggestion

Enhancement purpose

We implemented it in AWH due to lack of protos initially. We can do it better.

Solution

Wait for https://github.com/SteamRE/SteamKit/pull/1342 to happen, then we can rewrite AWH method into AH replacement.

Why currently available solutions are not sufficient?

The performance is suboptimal. We can utilize better API when we'll have needed protos.

Can you help us with this enhancement idea?

Yes, I can code the solution myself and send a pull request

Additional info

No response