Update Razor cohosting to be 'on' by default. (#8469)

Author: phil-allen-msft

CHANGELOG.md

@@ -4,6 +4,7 @@
 - Debug from .csproj and .sln [#5876](https://github.com/dotnet/vscode-csharp/issues/5876)
 
 # 2.88.x
+* Enable Razor Cohosting "on" by default (PR: [#8469](https://github.com/dotnet/vscode-csharp/pull/8469))
 * Bump Roslyn to 5.0.0-2.25375.9 (PR: [#8463](https://github.com/dotnet/vscode-csharp/pull/8463))
   * Add diagnostic provider for clients without dynamic registration(PR: [#77984](https://github.com/dotnet/roslyn/pull/77984))
   * Fix eol handling on the last token in a file when formatting code actions(PR: [#79602](https://github.com/dotnet/roslyn/pull/79602))

package.json

@@ -1560,7 +1560,7 @@
           },
           "razor.languageServer.cohostingEnabled": {
             "type": "boolean",
-            "default": false,
+            "default": true,
             "description": "%configuration.razor.languageServer.cohostingEnabled%",
             "tags": [
               "experimental"

test/razor/razorIntegrationTests/testAssets/RazorApp/.vscode/devkit_RazorApp.code-workspace

@@ -9,6 +9,7 @@
         "dotnet.server.useOmnisharp": false,
         "omnisharp.enableLspDriver": false,
         "razor.server.trace": "Trace",
-        "dotnet.preferCSharpExtension": false
+        "dotnet.preferCSharpExtension": false,
+        "razor.languageServer.cohostingEnabled": false
     }
 }