Merged PR 728346: Revert package upgrade for vscode extension

- There are some dependent packages that need to be upgraded at the same time.

cg/nuget/cgmanifest.json

@@ -537,7 +537,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "MessagePack",
-          "Version": "2.5.108"
+          "Version": "2.2.85"
         }
       }
     },
@@ -546,7 +546,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "MessagePack.Annotations",
-          "Version": "2.5.108"
+          "Version": "2.2.85"
         }
       }
     },
@@ -2382,7 +2382,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "Microsoft.VisualStudio.Threading",
-          "Version": "17.6.40"
+          "Version": "17.0.32-alpha"
         }
       }
     },
@@ -2418,7 +2418,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "Microsoft.VisualStudio.Validation",
-          "Version": "17.0.71"
+          "Version": "16.10.35"
         }
       }
     },
@@ -2499,7 +2499,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "Nerdbank.Streams",
-          "Version": "2.9.112"
+          "Version": "2.6.81"
         }
       }
     },
@@ -2688,7 +2688,7 @@
         "Type": "NuGet",
         "NuGet": {
           "Name": "StreamJsonRpc",
-          "Version": "2.15.29"
+          "Version": "2.8.28"
         }
       }
     },

config.nuget.vssdk.dsc

@@ -36,14 +36,14 @@ export const pkgs = [
     { id: "Microsoft.VisualStudio.TextManager.Interop.8.0", version: "8.0.50728" },
     { id: "Microsoft.VisualStudio.TextManager.Interop.9.0", version: "9.0.30730" },
     { id: "Microsoft.VisualStudio.TextManager.Interop", version: "7.10.6071" },
-    { id: "Microsoft.VisualStudio.Threading", version: "17.6.40", dependentPackageIdsToSkip: ["Microsoft.Bcl.AsyncInterfaces"] },
+    { id: "Microsoft.VisualStudio.Threading", version: "17.0.32-alpha", dependentPackageIdsToSkip: ["Microsoft.Bcl.AsyncInterfaces"] },
     { id: "Microsoft.VisualStudio.Utilities", version: "15.8.28010" },
-    { id: "Microsoft.VisualStudio.Validation", version: "17.0.71" },
+    { id: "Microsoft.VisualStudio.Validation", version: "16.10.35" },
     { id: "stdole", version: "7.0.3303" },
-    { id: "StreamJsonRpc", version: "2.15.29" },
-    { id: "MessagePack", version: "2.5.108" },
-    { id: "MessagePack.Annotations", version: "2.5.108" },
-    { id: "Nerdbank.Streams", version: "2.9.112", dependentPackageIdsToSkip: ["Microsoft.Bcl.AsyncInterfaces"] },
+    { id: "StreamJsonRpc", version: "2.8.28" },
+    { id: "MessagePack", version: "2.2.85" },
+    { id: "MessagePack.Annotations", version: "2.2.85" },
+    { id: "Nerdbank.Streams", version: "2.6.81", dependentPackageIdsToSkip: ["Microsoft.Bcl.AsyncInterfaces"] },
     { id: "Microsoft.IO.Redist", version: "4.7.1" },
     { id: "Microsoft.VisualStudio.SDK.Analyzers", version: "16.10.10" },
     { id: "Microsoft.VisualStudio.GraphModel", version: "17.0.0-previews-3-31605-261" },