Use Rest Api to upload to the feed

Add pulling logic to make sure it is uploaded to the feed.

Add retry logic for the whole upload process

Remove the old upload script

build_projects/dotnet-cli-build/UploadToLinuxPackageRepository/FileUploadStrategy.cs

@@ -0,0 +1,49 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.IO;
+using System.Net.Http;
+using System.Threading.Tasks;
+using NuGet.Protocol;
+
+namespace Microsoft.DotNet.Cli.Build.UploadToLinuxPackageRepository
+{
+    internal class FileUploadStrategy : IAzurelinuxRepositoryServiceHttpStrategy
+    {
+        private readonly string _pathToPackageToUpload;
+
+        public FileUploadStrategy(string pathToPackageToUpload)
+        {
+            _pathToPackageToUpload = pathToPackageToUpload
+                                     ?? throw new ArgumentNullException(nameof(pathToPackageToUpload));
+        }
+
+        public async Task<string> Execute(HttpClient client, Uri baseAddress)
+        {
+            var fileName = Path.GetFileName(_pathToPackageToUpload);
+
+            using (var content =
+                new MultipartFormDataContent())
+            {
+                var url = new Uri(baseAddress, "/v1/files");
+                content.Add(
+                    new StreamContent(
+                        new MemoryStream(
+                            File.ReadAllBytes(_pathToPackageToUpload))),
+                    "file",
+                    fileName);
+                using (var message = await client.PostAsync(url, content))
+                {
+                    if (!message.IsSuccessStatusCode)
+                    {
+                        throw new FailedToAddPackageToPackageRepositoryException(
+                            $"{message.ToJson()} failed to post file to {url} file name:{fileName} pathToPackageToUpload:{_pathToPackageToUpload}");
+                    }
+                    return await message.Content.ReadAsStringAsync();
+                }
+            }
+        }
+    }
+}