v9 SDK doesn't print nupkg path on dotnet pack

[AArnott]

Describe the bug

All prior versions of the .NET SDK printed the path of a built .nupkg. But the v9 preview hides this, favoring to only print the path to the built .dll.

To Reproduce

dotnet new classlib -o tst
cd tst
dotnet pack

Actual output

Restore complete (0.3s)
You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy
  tst succeeded (2.2s) → bin\Release\net9.0\tst.dll

Build succeeded in 2.9s

Workload updates are available. Run `dotnet workload list` for more information.

Expected output

Since this was a dotnet pack command, I expect to see the path to the package.

Restore complete (0.3s)
You are using a preview version of .NET. See: https://aka.ms/dotnet-support-policy
  tst succeeded (2.2s) → artifacts\Debug\packages\tst.1.0.0.nupkg

Build succeeded in 2.9s

Workload updates are available. Run `dotnet workload list` for more information.

Further technical details

9.0.100-preview.7.24407.12

[baronfel]

This is a gap in terminal logger. We're tracking an issue in MSBuild about generalizing the "output detection" mechanism that tasks can use. We could potentially try to special case pack here in the short term, but we were hoping to have something generalized before too much longer.

@rainersigwald

[rainersigwald]

We should special-case it for 9 IMO

[marcpopMSFT]

looks like there's already a tracking issue in msbuild so closing here.