Cannot rebuild projects due to exe file being locked

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

I'm running https://github.com/dotnet/eShopSupport from VS, launching using Ctrl+F5. I understand that when subsequently building a referenced project (e.g., the `Backend` project in that solution), VS is supposed to shut down and restart that one project while leaving AppHost running ([citation](https://github.com/dotnet/aspire/issues/1940)).

However, the vast majority of the time, this does not work for me, and building a referenced project fails with errors like:

```
1>C:\Program Files\Microsoft Visual Studio\2022\IntPreview\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets(5321,5): warning MSB3026: Could not copy "D:\git\dotnet\eShopSupport\src\Backend\obj\Debug\net8.0\apphost.exe" to "bin\Debug\net8.0\Backend.exe". Beginning retry 1 in 1000ms. The process cannot access the file 'bin\Debug\net8.0\Backend.exe' because it is being used by another process. The file is locked by: "Backend (2592)"
1>C:\Program Files\Microsoft Visual Studio\2022\IntPreview\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets(5321,5): warning MSB3026: Could not copy "D:\git\dotnet\eShopSupport\src\Backend\obj\Debug\net8.0\apphost.exe" to "bin\Debug\net8.0\Backend.exe". Beginning retry 2 in 1000ms. The process cannot access the file 'bin\Debug\net8.0\Backend.exe' because it is being used by another process. The file is locked by: "Backend (2592)"
1>C:\Program Files\Microsoft Visual Studio\2022\IntPreview\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets(5321,5): warning MSB3026: Could not copy "D:\git\dotnet\eShopSupport\src\Backend\obj\Debug\net8.0\apphost.exe" to "bin\Debug\net8.0\Backend.exe". Beginning retry 3 in 1000ms. The process cannot access the file 'bin\Debug\net8.0\Backend.exe' because it is being used by another process. The file is locked by: "Backend (2592)"
1>C:\Program Files\Microsoft Visual Studio\2022\IntPreview\MSBuild\Current\Bin\amd64\Microsoft.Common.CurrentVersion.targets(5321,5): warning MSB3026: Could not copy "D:\git\dotnet\eShopSupport\src\Backend\obj\Debug\net8.0\apphost.exe" to "bin\Debug\net8.0\Backend.exe". Beginning retry 4 in 1000ms. The process cannot access the file 'bin\Debug\net8.0\Backend.exe' because it is being used by another process. The file is locked by: "Backend (2592)"
etc.
```

I've tried VS versions:

* Version 17.11.0 Preview 4.0
* Version 17.12.0 Preview 1.0 [35117.301.main]

and have disabled every VS extension I can, and disabled hot reload, but the same issue remains.

This is the most impactful issue on productivity when working on this project, as there's no choice but to manually kill and restart `AppHost` for literally every code change, which in turn means restarting some large Docker containers including Ollama.

I don't think it's specifically a problem in the app code, because it *sometimes* works. If I restart VS often enough and keep deleting the `.vs` directory, then occasionally it can rebuild the referenced projects without the file being locked. But this is a short-lived victory as the locking problem soon comes back and is present the vast majority of the time.

### Expected Behavior

VS should be able to rebuild referenced projects without failing due to the `.exe` or `.dll` files being locked.

### Steps To Reproduce

* Clone and run https://github.com/dotnet/eShopSupport (via Ctrl+F5 in VS)
* Visit `StaffWebUI` and observe it working
* Make any edit (e.g., whitespace) in `src/Backend/Program.cs` and try to build that one project
* Expected: builds that one project while leaving AppHost running
* Actual: fails with the "file locked" error mentioned above

### Exceptions (if any)

_No response_

### .NET Version info

.NET SDK:
Version: 8.0.400-preview.0.24324.5
Commit: 736a2616db
Workload version: 8.0.400-manifests.7ccdde63
MSBuild version: 17.11.0+1192b22fd

Runtime Environment:
OS Name: Windows
OS Version: 10.0.22631
OS Platform: Windows
RID: win-x64
Base Path: C:\Program Files\dotnet\sdk\8.0.400-preview.0.24324.5\

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
[aspire]
Installation Source: SDK 8.0.400-preview.0, VS 17.11.35111.106, VS 17.12.35117.301
Manifest Version: 8.0.2/8.0.100
Manifest Path: C:\Program Files\dotnet\sdk-manifests\8.0.100\microsoft.net.sdk.aspire\8.0.2\WorkloadManifest.json
Install Type: Msi

Host:
Version: 8.0.7
Architecture: x64
Commit: 2aade6beb0

.NET SDKs installed:
7.0.120 [C:\Program Files\dotnet\sdk]
8.0.107 [C:\Program Files\dotnet\sdk]
8.0.400-preview.0.24324.5 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.7 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.7 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 6.0.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.19 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 7.0.20 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 8.0.7 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

### Anything else?

Aspire packages are all 8.0.2