[NETSDKE2E][Workload Sets] Running dotnet workload restore should install the workload set when using global.json

[NicoleWang001]

Describe the bug

Running dotnet workload restore` should install the workload set when using global.json

To Reproduce

1. Install .NET 8.0.400 SDK

2. Install workload within manifest mode. eg. aspire workload
   

3. New global.json and add workloadverison
   dotnet new global.json

    {
      "sdk": {
        "version": "8.0.400",
        "workloadVersion": "8.0.400"
      }
    }

5. Try to run dotnet workload restore to install the workload set.

Expected Result

Run dotnet workload restore should install the workload set eg. 'dotnet workload list'

Actual Result

Unhandled exception:

[Forgind]

Thanks for the bug! This is an interesting chicken-and-egg type problem in that the workload restore command creates and executes a WorkloadInstallCommand that would install the correct workload set, but before it has a chance to do that, we need to know which workloads to install, so we create a new ProjectInstance and execute a special target that hunts for any workloads we might need, but as part of that, it creates a workload resolver and searches for the manifests it needs, which triggered this error. In other words, we need to run Install before we'll have the right workload set, but we can't run Install until we know which workloads to install. We can't figure out the workloads to install without creating a project, and to do that, we have to already have the workload set installed.

I should be able to make a fix to this soon 🙂