feat: adjust capabilities

[adekbadek]

All Submissions:

• Have you followed the Newspack Contributing guideline?
• Does your code follow the WordPress' coding standards and VIP Go coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

Adjusts caps, so the unavailable menu options are hidden for non-admins.

Dependent on Automattic/newspack-plugin#3920

How to test the changes in this Pull Request:

1. On trunk,
2. Create a new author user and log in as them
3. Observe the Network → Subscriptions and → Orders admin menus are displayed

4. Switch to this branch, observe these items are not displayed
5. Log in a the site administrator, confirm you can access these and other Network page via the admin menu

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully ran tests with your changes locally?

[naxoc]

I tested this locally. It does indeed make the menu item go away, but it is also gone for my admin user. Should the capability be added/registered somewhere for it to work?

[naxoc]

Nit: it's the same namespace, so \Network_Network\ is not needed

[adekbadek]

Thanks! Fixed in aca3096

[adekbadek]

I tested this locally. It does indeed make the menu item go away, but it is also gone for my admin user. Should the capability be added/registered somewhere for it to work?

Ah, that's true. This will depend on Automattic/newspack-plugin#3920, then, when it's merged.