Add hiddenWhen to debuggers in package.json (#6405)

* Add hiddenWhen to debuggers in package.json

This PR adds the 'hiddenWhen' attribute to debuggers contributed by the
C# Extension.

Author: WardenGnaw

package.json

@@ -1943,6 +1943,7 @@
       {
         "type": "coreclr",
         "label": ".NET 5+ and .NET Core",
+        "hiddenWhen": "dotnet.debug.serviceBrokerAvailable",
         "languages": [
           "csharp",
           "razor",
@@ -3097,6 +3098,7 @@
       {
         "type": "clr",
         "when": "workspacePlatform == windows",
+        "hiddenWhen": "dotnet.debug.serviceBrokerAvailable",
         "label": ".NET Framework 4.x",
         "languages": [
           "csharp",
@@ -4144,6 +4146,7 @@
       {
         "type": "blazorwasm",
         "label": "Blazor WebAssembly Debug",
+        "hiddenWhen": "dotnet.debug.serviceBrokerAvailable",
         "initialConfigurations": [
           {
             "type": "blazorwasm",