chore: Embed unit test data (#1812)

* Embed unit test data

* Add testdata

Co-authored-by: anqiansong <anqiansong@bytedance.com>

tools/goctl/api/gogen/testdata/has_comment_api_test.api

@@ -0,0 +1,20 @@
+type Inline struct {
+
+}
+
+type Request struct {
+    Inline
+    Name string `path:"name,options=you|me"` // name in path
+}
+
+type Response struct {
+    Message string `json:"msg"` // message
+}
+
+service A-api {
+    @doc ("helloworld")
+    @server(
+        handler: GreetHandler
+    )
+    get /greet/from/:name(Request) returns (Response)
+}