fix: openai response should contains model (#841)

* fix: openai response should contains `model`

- Update model attributes in `claudeHandler` for `relay-claude.go`
- Implement model type for fullTextResponse in `relay-gemini.go`
- Add new `Model` field to `OpenAITextResponse` struct in `relay.go`

* chore: set model name response for models

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Co-authored-by: JustSong <songquanpeng@foxmail.com>

controller/relay-zhipu.go

@@ -290,6 +290,7 @@ func zhipuHandler(c *gin.Context, resp *http.Response) (*OpenAIErrorWithStatusCo
 		}, nil
 	}
 	fullTextResponse := responseZhipu2OpenAI(&zhipuResponse)
+	fullTextResponse.Model = "chatglm"
 	jsonResponse, err := json.Marshal(fullTextResponse)
 	if err != nil {
 		return errorWrapper(err, "marshal_response_body_failed", http.StatusInternalServerError), nil