v13 - TargetFramework not respected in ProjectResource

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Describe the bug

After uplifting Aspire to v13.0.0, `TargetFramework` in `MyProject.csproj` is not respected. This breaks things for us at runtime, meaning we are hard-blocked from upgrading.

### Expected Behavior

Expected `MyProject` to run with the framework specified in its `.csproj`

### Steps To Reproduce

### Directory Structure
```
repos/
- RepoA/
- Aspire.sln
- global.json (sdk.version: 9.0.304)
- AppHost/
- AppHost.csproj
- RepoB/
- MySln.sln
- global.json (sdk.version: 8.0.413)
- MyProject/
- MyProject.csproj (net8.0)
- Program.cs
```

RepoB/MyProject/Program.cs:
```csharp
System.Console.WriteLine($"Runtime FW: {System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription}");
```

### Steps to Reproduce:
1. `cd RepoB/MyProject && dotnet run`
```
Runtime FW: .NET 8.0.21
```
2. `cd RepoA && aspire run`
```
...
Runtime FW: .NET 8.0.21
```
3. Update to Aspire v13.0.0
4. `cd RepoA && aspire run`
```
...
Runtime FW: .NET 10.0.0
```

### Exceptions (if any)

_No response_

### .NET Version info

```
.NET SDK:
Version: 10.0.100
Commit: b0f34d51fc
Workload version: 10.0.100.1
MSBuild version: 18.0.2+b0f34d51f

Runtime Environment:
OS Name: Mac OS X
OS Version: 15.6
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/10.0.100/

.NET workloads installed:
There are no installed workloads to display.
Configured to use workload sets when installing new manifests.

Host:
Version: 10.0.0
Architecture: arm64
Commit: b0f34d51fc

.NET SDKs installed:
6.0.418 [/usr/local/share/dotnet/sdk]
7.0.404 [/usr/local/share/dotnet/sdk]
7.0.410 [/usr/local/share/dotnet/sdk]
8.0.121 [/usr/local/share/dotnet/sdk]
8.0.411 [/usr/local/share/dotnet/sdk]
8.0.413 [/usr/local/share/dotnet/sdk]
9.0.301 [/usr/local/share/dotnet/sdk]
9.0.304 [/usr/local/share/dotnet/sdk]
9.0.305 [/usr/local/share/dotnet/sdk]
9.0.306 [/usr/local/share/dotnet/sdk]
10.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.26 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.14 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.20 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.17 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.19 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.21 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.10 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 10.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.26 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.14 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.17 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.19 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.21 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.10 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 10.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
None
```

### Anything else?

_No response_