esp_http_server: fix return values for `httpd_socket_send()` and `httpd_socket_recv()` APIs

Closes https://github.com/espressif/esp-idf/issues/10658

components/esp_http_server/src/httpd_txrx.c

@@ -622,10 +622,10 @@ int httpd_socket_send(httpd_handle_t hd, int sockfd, const char *buf, size_t buf
 {
     struct sock_db *sess = httpd_sess_get(hd, sockfd);
     if (!sess) {
-        return ESP_ERR_INVALID_ARG;
+        return HTTPD_SOCK_ERR_INVALID;
     }
     if (!sess->send_fn) {
-        return ESP_ERR_INVALID_STATE;
+        return HTTPD_SOCK_ERR_INVALID;
     }
     return sess->send_fn(hd, sockfd, buf, buf_len, flags);
 }
@@ -634,10 +634,10 @@ int httpd_socket_recv(httpd_handle_t hd, int sockfd, char *buf, size_t buf_len,
 {
     struct sock_db *sess = httpd_sess_get(hd, sockfd);
     if (!sess) {
-        return ESP_ERR_INVALID_ARG;
+        return HTTPD_SOCK_ERR_INVALID;
     }
     if (!sess->recv_fn) {
-        return ESP_ERR_INVALID_STATE;
+        return HTTPD_SOCK_ERR_INVALID;
     }
     return sess->recv_fn(hd, sockfd, buf, buf_len, flags);
 }