C#: Add logging of the NuGet CLI command.

Author: michaelnebel

csharp/extractor/Semmle.Extraction.CSharp.DependencyFetching/PackagesConfigRestorer.cs

@@ -212,6 +212,7 @@ private bool TryRestoreNugetPackage(string packagesConfig)
                 var threadId = Environment.CurrentManagedThreadId;
                 void onOut(string s) => logger.LogDebug(s, threadId);
                 void onError(string s) => logger.LogError(s, threadId);
+                logger.LogInfo($"Running '{exe} {string.Join(" ", args)}'");
                 var exitCode = pi.ReadOutput(out _, onOut, onError);
                 if (exitCode != 0)
                 {