Use ProjectTestHelpers.GetPackageSpecWithProjectNameAndSpec and remove redundant properties

Co-authored-by: nkolev92 <[email protected]>

Author: Copilot

test/NuGet.Core.Tests/NuGet.Commands.Test/RestoreCommandTests/RestoreCommandTests.cs

@@ -2052,12 +2052,9 @@ await SimpleTestPackageUtility.CreateFolderFeedV3Async(
                 packageZ2
             );
 
-            // Create project.json with central package management and transitive pinning
             var project1Json = @"
             {
-              ""version"": ""1.0.0"",
               ""restore"": {
-                ""projectUniqueName"": ""TestProject"",
                 ""centralPackageVersionsManagementEnabled"": true,
                 ""CentralPackageTransitivePinningEnabled"": true
               },
@@ -2084,12 +2081,9 @@ await SimpleTestPackageUtility.CreateFolderFeedV3Async(
               }
             }";
 
-            var spec = JsonPackageSpecReader.GetPackageSpec(project1Json, projectName, Path.Combine(projectPath, $"{projectName}.json")).WithTestRestoreMetadata();
+            var spec = ProjectTestHelpers.GetPackageSpecWithProjectNameAndSpec(projectName, pathContext.SolutionRoot, project1Json);
 
-            var request = new TestRestoreRequest(spec, sources, pathContext.UserPackagesFolder, logger)
-            {
-                LockFilePath = Path.Combine(projectPath, "project.assets.json")
-            };
+            var request = new TestRestoreRequest(spec, sources, pathContext.UserPackagesFolder, logger);
 
             var command = new RestoreCommand(request);