Revert "make repo build on .NET 8 SDK"

This reverts commit f4f46c6.

Author: baronfel

Microsoft.NET.Build.Containers.IntegrationTests/CommandUtils/TestCommand.cs

@@ -117,7 +117,7 @@ private SdkCommandSpec CreateCommandSpec(IEnumerable<string> args)
                 commandSpec.WorkingDirectory = WorkingDirectory;
             }
 
-            if (Arguments.Count > 0)
+            if (Arguments.Any())
             {
                 commandSpec.Arguments = Arguments.Concat(commandSpec.Arguments).ToList();
             }

Microsoft.NET.Build.Containers/AuthHandshakeMessageHandler.cs

@@ -37,7 +37,7 @@ private static bool TryParseAuthenticationInfo(HttpResponseMessage msg, [NotNull
         scheme = null;
 
         var authenticateHeader = msg.Headers.WwwAuthenticate;
-        if (!(authenticateHeader.Count > 0))
+        if (!authenticateHeader.Any())
         {
             return false;
         }
@@ -111,7 +111,7 @@ private sealed record TokenResponse(string? token, string? access_token, int? ex
                 throw new CredentialRetrievalException(registry, e);
             }
         }
-
+        
         if (scheme is "Basic")
         {
             var basicAuth = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes($"{privateRepoCreds.Username}:{privateRepoCreds.Password}")));

Microsoft.NET.Build.Containers/ImageConfig.cs

@@ -66,15 +66,15 @@ internal string BuildConfig()
     {
         var newConfig = new JsonObject();
 
-        if (_exposedPorts.Count > 0)
+        if (_exposedPorts.Any())
         {
             newConfig["ExposedPorts"] = CreatePortMap();
         }
-        if (_labels.Count > 0)
+        if (_labels.Any())
         {
             newConfig["Labels"] = CreateLabelMap();
         }
-        if (_environmentVariables.Count > 0)
+        if (_environmentVariables.Any())
         {
             newConfig["Env"] = CreateEnvironmentVariablesMapping();
         }

Microsoft.NET.Build.Containers/Tasks/ParseContainerProperties.cs

@@ -106,7 +106,7 @@ public override bool Execute()
         else if (ContainerImageTags.Length != 0 && TryValidateTags(ContainerImageTags, out var valids, out var invalids))
         {
             validTags = valids;
-            if (invalids.Length > 0)
+            if (invalids.Any())
             {
                 Log.LogErrorWithCodeFromResources(nameof(Strings.InvalidTags), nameof(ContainerImageTags), String.Join(",", invalids));
                 return !Log.HasLoggedErrors;

containerize/ContainerizeCommand.cs

@@ -168,7 +168,7 @@ internal class ContainerizeCommand : RootCommand
 
 
     internal ContainerizeCommand() : base("Containerize an application without Docker.")
-    {
+    { 
         this.AddArgument(PublishDirectoryArgument);
         this.AddOption(BaseRegistryOption);
         this.AddOption(BaseImageNameOption);