Datasources: Handle URL parsing error (#25742)

Adds handling of error returned from URL parsing.

Fixes #25714

pkg/tsdb/elasticsearch/client/client.go

@@ -154,12 +154,14 @@ func (c *baseClientImpl) encodeBatchRequests(requests []*multiRequest) ([]byte,
 }
 
 func (c *baseClientImpl) executeRequest(method, uriPath, uriQuery string, body []byte) (*response, error) {
-	u, _ := url.Parse(c.ds.Url)
+	u, err := url.Parse(c.ds.Url)
+	if err != nil {
+		return nil, err
+	}
 	u.Path = path.Join(u.Path, uriPath)
 	u.RawQuery = uriQuery
 
 	var req *http.Request
-	var err error
 	if method == http.MethodPost {
 		req, err = http.NewRequest(http.MethodPost, u.String(), bytes.NewBuffer(body))
 	} else {