change azure engine config to modelMapper (#306)

* change azure engine config to azure modelMapper config

* Update go.mod

* Revert "Update go.mod"

This reverts commit 78d14c58f2a9ce668da43f6adbe20b60afcfe0d7.

* lint fix

* add test

* lint fix

* lint fix

* lint fix

* opt

* opt

* opt

* opt

embeddings.go

@@ -132,7 +132,7 @@ type EmbeddingRequest struct {
 // CreateEmbeddings returns an EmbeddingResponse which will contain an Embedding for every item in |request.Input|.
 // https://beta.openai.com/docs/api-reference/embeddings/create
 func (c *Client) CreateEmbeddings(ctx context.Context, request EmbeddingRequest) (resp EmbeddingResponse, err error) {
-	req, err := c.requestBuilder.build(ctx, http.MethodPost, c.fullURL("/embeddings"), request)
+	req, err := c.requestBuilder.build(ctx, http.MethodPost, c.fullURL("/embeddings", request.Model.String()), request)
 	if err != nil {
 		return
 	}