Look for shipping artifacts according to the build configuration (#8616)

Author: RussKie

tests/Shared/TemplatesTesting/BuildEnvironment.cs

@@ -101,7 +101,11 @@ public BuildEnvironment(bool useSystemDotNet = false, string sdkDirName = "dotne
                 sdkForTemplatePath = Path.GetDirectoryName(dotnetPath)!;
             }
 
-            BuiltNuGetsPath = Path.Combine(RepoRoot.FullName, "artifacts", "packages", EnvironmentVariables.BuildConfiguration, "Shipping");
+#if RELEASE
+            BuiltNuGetsPath = Path.Combine(RepoRoot.FullName, "artifacts", "packages", "Release", "Shipping");
+#else
+            BuiltNuGetsPath = Path.Combine(RepoRoot.FullName, "artifacts", "packages", "Debug", "Shipping");
+#endif
 
             PlaywrightProvider.DetectAndSetInstalledPlaywrightDependenciesPath(RepoRoot);
         }

tests/Shared/TemplatesTesting/EnvironmentVariables.cs

@@ -11,8 +11,7 @@ public static class EnvironmentVariables
     public static readonly string? BuiltNuGetsPath           = Environment.GetEnvironmentVariable("BUILT_NUGETS_PATH");
     public static readonly bool    ShowBuildOutput           = Environment.GetEnvironmentVariable("SHOW_BUILD_OUTPUT") is "true";
     public static readonly bool    IsRunningOnCI             = Environment.GetEnvironmentVariable("HELIX_WORKITEM_ROOT") is not null;
-    public static readonly bool    TestsRunningOutsideOfRepo     = Environment.GetEnvironmentVariable("TestsRunningOutsideOfRepo") is "true";
-    public static readonly string  BuildConfiguration        = Environment.GetEnvironmentVariable("BUILD_CONFIGURATION") ?? "Debug";
+    public static readonly bool    TestsRunningOutsideOfRepo = Environment.GetEnvironmentVariable("TestsRunningOutsideOfRepo") is "true";
     public static readonly string? TestScenario              = Environment.GetEnvironmentVariable("TEST_SCENARIO");
     public static readonly string? DefaultTFMForTesting      = Environment.GetEnvironmentVariable("DEFAULT_TFM_FOR_TESTING");
 }