Core now supports special pages registering sub menus
natively in skins. The menu is rendered when the skin
supports it, so at current time of writing this will
only work in Vector 2022 and MinervaNeue.
The existing menu that appears under the abuse filter
page title is converted into the new format. For other skins
no difference.
Bug: T315553
Change-Id: Ief51a9c60125c11e3b735fabee2a4544b7955f64
This commit doesn't change any permissions for anybody.
It's the first step to achieve what the task asks for.
Bug: T242821
Change-Id: I8060ca926e6769b11d470fe4037854cda496000d