Update test schema (#3110)

The file was always appearing dirty after running tests, looks like we
forgot to update it at some point.

Author: VenelinMartinov

internal/testprovider_sdkv2/cmd/pulumi-resource-tpsdkv2/schema.json

@@ -168,7 +168,10 @@
             "outputs": {
                 "properties": {
                     "result": {
-                        "type": "string"
+                        "additionalProperties": {
+                            "$ref": "pulumi.json#/Any"
+                        },
+                        "type": "object"
                     }
                 },
                 "required": [