(fix) RepositoryContentsClient.GetArchive does not return the expected binary content (#2803)

* (GH-2802) Add unit test to demonstrate the problem

This unit test currently fails which demonstrates the problem and it should pass when I am done with the PR

* (GH-2802) Add a GetRaw method that accepts a timeout

I debated adding an optional parameter for the timeout to the existing GetRaw method (which would be my personal preference) but it would be a breaking change and I doubt the Octokit team would be interested in such a change

* (GH-2802) Invoke `GetRaw` rather than `Get>byte[]>` when retrieving a repo's archive content.

This ensure stream content are handled properly and solves the problem described in GitHub issue 2802

* (GH-2802) Fix unit tests that got broken due to my recent change to the GetArchive method

* (GH-2802) Fix formatting

* (GH-2802) Fix more formatting

Octokit/Http/Connection.cs

@@ -242,7 +242,21 @@ namespace Octokit
                 Endpoint = uri.ApplyParameters(parameters)
             });
         }
-        
+
+        /// <inheritdoc/>
+        public Task<IApiResponse<byte[]>> GetRaw(Uri uri, IDictionary<string, string> parameters, TimeSpan timeout)
+        {
+            Ensure.ArgumentNotNull(uri, nameof(uri));
+
+            return GetRaw(new Request
+            {
+                Method = HttpMethod.Get,
+                BaseAddress = BaseAddress,
+                Endpoint = uri.ApplyParameters(parameters),
+                Timeout = timeout
+            });
+        }
+
         /// <inheritdoc/>
         public Task<IApiResponse<Stream>> GetRawStream(Uri uri, IDictionary<string, string> parameters)
         {