Inconsistent NuGet icons for metapackages on NuGet

### Describe the bug

Meta packages use the default NuGet product icon, which looks like it's not an official thing. Some packages do, some don't - which makes it feel inconsistent and unpolished:

The WinUI package should be using the WinUI logo:

### Steps to reproduce the bug

- Create a new WinUI project
- Right-click the project name, and go to "Manage NuGet packages.."
- See the Windows App SDK packages under Transitive packages

### Expected behavior

All WASDK packages should be using the Windows App SDK product icon. See: https://github.com/microsoft/WindowsAppSDK/issues/5967

### Screenshots

_No response_

### NuGet package version

None

### Packaging type

_No response_

### Windows version

_No response_

### IDE

_No response_

### Additional context

_No response_