Fix package restore for C++/CLI projects

See #9814

Author: drewnoakes

src/Microsoft.VisualStudio.ProjectSystem.Managed.VS/ProjectSystem/VS/PackageRestore/NuGetRestoreService.cs

@@ -10,7 +10,8 @@ namespace Microsoft.VisualStudio.ProjectSystem.VS.PackageRestore;
 [Export(typeof(INuGetRestoreService))]
 [Export(ExportContractNames.Scopes.UnconfiguredProject, typeof(IProjectDynamicLoadComponent))]
 [AppliesTo(ProjectCapability.PackageReferences)]
-[ProjectDynamicLoadComponent(ProjectLoadCheckpoint.AfterLoadInitialConfiguration)]
+// Commented out per: https://github.com/dotnet/project-system/issues/9814
+//[ProjectDynamicLoadComponent(ProjectLoadCheckpoint.AfterLoadInitialConfiguration)]
 internal class NuGetRestoreService : OnceInitializedOnceDisposed, INuGetRestoreService, IProjectDynamicLoadComponent, IVsProjectRestoreInfoSource
 {
     private readonly UnconfiguredProject _project;

src/Microsoft.VisualStudio.ProjectSystem.Managed/ProjectSystem/PackageRestore/PackageRestoreDataSource.cs

@@ -16,7 +16,8 @@ namespace Microsoft.VisualStudio.ProjectSystem.PackageRestore;
 [Export(typeof(IPackageRestoreDataSource))]
 [Export(ExportContractNames.Scopes.UnconfiguredProject, typeof(IProjectDynamicLoadComponent))]
 [AppliesTo(ProjectCapability.PackageReferences)]
-[ProjectDynamicLoadComponent(ProjectLoadCheckpoint.ProjectBackgroundLoadCompleted)]
+// Commented out per: https://github.com/dotnet/project-system/issues/9814
+//[ProjectDynamicLoadComponent(ProjectLoadCheckpoint.ProjectBackgroundLoadCompleted)]
 internal partial class PackageRestoreDataSource : ChainedProjectValueDataSourceBase<RestoreData>, IPackageRestoreDataSource, IProjectDynamicLoadComponent
 {
     // This class represents the last data source in the package restore chain, which is made up of the following: