avoid exceptions in PrepareRemoteExecutor()

tests/ImageSharp.Tests/TestUtilities/TestEnvironment.cs

@@ -165,6 +165,9 @@ namespace SixLabors.ImageSharp.Tests
                 return;
             }
 
+            // Locate and run CorFlags.exe:
+            try
+            {
                 string windowsSdksDir = Path.Combine(Environment.GetEnvironmentVariable("PROGRAMFILES(x86)"),
                     "Microsoft SDKs", "Windows");
 
@@ -183,8 +186,6 @@ namespace SixLabors.ImageSharp.Tests
                     RedirectStandardError = true
                 };
 
-            try
-            {
                 using var proc = Process.Start(si);
                 proc.WaitForExit();
                 string standardOutput = proc.StandardOutput.ReadToEnd();