Benchmark validation doesn't appear to be working on non-Windows OS

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Describe the bug

Benchmarks written with benchmarkdotnet are validated on build:

https://github.com/dotnet/aspnetcore/blob/f0af11263e006d0df75b32d20d85bde5870a8d9c/eng/targets/CSharp.Common.targets#L133-L142

It appears that failures are only correctly reported on Windows. This behavior was noticed when I added a benchmark that is only valid for Windows, but tests all passed.

For example, I added an exception to a benchmark's setup here - https://github.com/dotnet/aspnetcore/pull/46491 - and only Windows tests failed:


I can see in the logs that they are being detected and run on other OS, but no error reported:


### Expected Behavior

Validation reports problems and the build fails on Linux and macOS.

### Steps To Reproduce

https://github.com/dotnet/aspnetcore/pull/46491

### Exceptions (if any)

_No response_

### .NET Version

_No response_

### Anything else?

_No response_