Disable file based program support by default in release (#8342)

Author: dibarbet

package.json

@@ -1509,7 +1509,7 @@
           },
           "dotnet.projects.enableFileBasedPrograms": {
             "type": "boolean",
-            "default": true,
+            "default": false,
             "description": "%configuration.dotnet.projects.enableFileBasedPrograms%",
             "tags": [
               "preview"