chore: update vscode setting enforcement for go111module="on" (#1738)

vscode setting enforcement for go111module to set on and availability of schema for go extension

.vscode/settings.json

@@ -1,5 +1,9 @@
 {
+  "json.schemaDownload.enable":true,
   "go.lintOnSave": "workspace",
   "go.lintTool": "golangci-lint",
-  "go.inferGopath": false
+  "go.inferGopath": false,
+  "go.toolsEnvVars": {
+    "GO111MODULE": "on"
+  }
 }