add SpecialFolder.UserProfile fallback

[kasperk81]

Description

when HOME is not set in container, nuget commands fail while other sdk commands work due to SpecialFolder.UserProfile fallback https://github.com/dotnet/sdk/blob/c3a8f72c3a5491c693ff8e49e7406136a12c3040/src/Common/CliFolderPathCalculatorCore.cs#L38-L38.

nuget already uses UserProfile with full framework, this pr adds the same fallback for coreclr.

  The "WarnForInvalidProjectsTask" task failed unexpectedly.
  System.InvalidOperationException: Required environment variable 'HOME' is not set. Try setting 'DOTNET_CLI_HOME' or 'HOME' and running the operation
     at NuGet.Common.NuGetEnvironment.GetValueOrThrowMissingEnvVarsDotnet(Func`1 getValue, String home, String dotnetHome)
     at NuGet.Common.NuGetEnvironment.GetHome()
     at NuGet.Common.NuGetEnvironment.<>c.<.cctor>b__20_0()
     at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
     at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
     at System.Lazy`1.CreateValue()
     at NuGet.Common.NuGetEnvironment.GetFolderPath(SpecialFolder folder)
     at NuGet.Common.NuGetEnvironment.GetFolderPath(NuGetFolderPath folder)
     at NuGet.Common.PathUtility.CheckIfFileSystemIsCaseInsensitive()
     at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
     at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
     at System.Lazy`1.CreateValue()
     at NuGet.Common.PathUtility.get_IsFileSystemCaseInsensitive()
     at NuGet.Common.PathUtility.GetStringComparerBasedOnOS()
     at NuGet.Build.Tasks.WarnForInvalidProjectsTask.Execute()
     at Microsoft.Build.BackEnd.TaskExecutionHost.Execute()
     at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(TaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)

fix NuGet/Home#13834

PR Checklist

• Meaningful title, helpful description and a linked NuGet/Home issue
• Added tests (idk, how to test it in ci)
• Link to an issue or pull request to update docs if this PR changes settings, environment variables, new feature, etc.

[kasperk81]

the timeout failures don't look related. @zivkan, please take a look thanks!