Component/bt: add svc_inst_id param for create service table event

- add svc_inst_id param for create service table event
  - Closes https://github.com/espressif/esp-idf/issues/3256

components/bt/bluedroid/api/include/api/esp_gatts_api.h

@@ -255,6 +255,7 @@ typedef union {
     struct gatts_add_attr_tab_evt_param{
         esp_gatt_status_t status;       /*!< Operation status */
         esp_bt_uuid_t svc_uuid;         /*!< Service uuid type */
+        uint8_t svc_inst_id;            /*!< Service id */
         uint16_t num_handle;            /*!< The number of the attribute handle to be added to the gatts database */
         uint16_t *handles;              /*!< The number to the handles */
     } add_attr_tab;                     /*!< Gatt server callback param of ESP_GATTS_CREAT_ATTR_TAB_EVT */

components/bt/bluedroid/btc/profile/std/gatt/btc_gatts.c

@@ -425,6 +425,8 @@ static void btc_gatts_act_create_attr_tab(esp_gatts_attr_db_t *gatts_attr_db,
     param.add_attr_tab.handles = btc_creat_tab_env.handles;
     memcpy(&param.add_attr_tab.svc_uuid, &btc_creat_tab_env.svc_uuid, sizeof(esp_bt_uuid_t));
 
+    param.add_attr_tab.svc_inst_id = srvc_inst_id;
+
     btc_gatts_cb_to_app(ESP_GATTS_CREAT_ATTR_TAB_EVT, gatts_if, &param);        
     //reset the env after sent the data to app
     memset(&btc_creat_tab_env, 0, sizeof(esp_btc_creat_tab_t));