WAP project remove the WinRT COM Server's winmd file incorrectly

Nobody has claimed this yet.

### Describe the bug

Related to #6351

WAP output directory structure
```
WAP_Output_Directory
├── OtherProject // ref WinRTCOMServer.winmd through
│ ├── ......
│ └── WinRTCOMServer.winmd
├── WinRTCOMServer
│ ├── ......
│ ├── WinRTCOMServer.dll
│ └── WinRTCOMServer.exe // No WinRTCOMServer.winmd
└── WinRTCOMServer.winmd // Placed here incorrectly
```
In `WAP_Output_Directory\\WinRTCOMServer\\`, there is no `WinRTCOMServer.winmd` placed beside `WinRTCOMServer.exe`. This behavior is because although we declare the WinRTCOMServer as `OutOfProcessServer` but WAP project will always consider it as `InProcessServer` incorrectly which already described in #6351 .

For in-process server case, the server implementation should be placed next to the client as it will be loaded into the client process, however, it's not the case for out-of-process. But the toolchain assumes we are using an in-process server always and does this unnecessary thing.

**Workaround:**
Add include the .winmd in the WinRTCOMServer by yourself.
```xml

false
%(Filename).winmd
PreserveNewest

```
### Steps to reproduce the bug

No need, please check the steps in #6351

### Expected behavior

```
WAP_Output_Directory
├── OtherProject
│ ├── ......
│ └── WinRTCOMServer.winmd
└── WinRTCOMServer
├── ......
├── WinRTCOMServer.dll
├── WinRTCOMServer.exe
└── WinRTCOMServer.winmd
```

### Screenshots

_No response_

### NuGet package version

1.8.260317003

### Packaging type

Packaged (MSIX)

### Windows version

Windows 11 version 24H2 (26100, June 2025 Update)

### IDE

Visual Studio 2022

### Additional context

_No response_

Start by reading the related issue #6351 and examining how WAP packages the OutOfProcessServer described here. Verify the packaged output with the provided project-item workaround as a reference; done means WinRTCOMServer.winmd is beside WinRTCOMServer.exe while remaining available to OtherProject, without requiring that manual workaround.

Written by the indexing model from the issue text.