Revert to nonos-sdk 2.2.1, new sdk-switching option in IDE menu for generic board only (#5763)

This commit allows switching SDK firmware:

nonos-sdk-pre-v3 shipped with release 2.5.0 has issues:

    * Some boards show erratic behavior (radio connection is quickly lost), with an unknown cause.
      These boards work well with previous nonos-sdk-2.2.1 firmware (#5736)

    * Overall performances seem to have decreased (#5513)

This PR restores sdk2.2.1 (as in core-2.4.2).

SDK-pre-3.0 - which has brought long awaited fixes (WiFi sleep modes) - is still available through a menu option available only with generic board.

BREAKING

    * new define `-DNONOSDK221=1` or `-DNONOSDK3V0=1`

    * for external build systems: new library directory: `tools/sdk/lib/<version>/lib`

    * PIO: variable `PIO_FRAMEWORK_ARDUINO_ESPRESSIF_SDK3` is needed for sdk-pre-v3.


Fix #5736

tools/sdk/include/user_interface.h

@@ -253,7 +253,9 @@ struct station_config {
                         // with both ssid[] and bssid[] matched. Please check about this.
     uint8 bssid[6];
     wifi_fast_scan_threshold_t threshold;
+#ifndef NONOSDK221
     bool open_and_wep_mode_disable; // Can connect to open/wep router by default.
+#endif
 };
 
 bool wifi_station_get_config(struct station_config *config);
@@ -432,6 +434,8 @@ typedef enum {
     MODEM_SLEEP_T
 } sleep_type_t;
 
+#ifndef NONOSDK221
+
 typedef enum {
     MIN_SLEEP_T,
     MAX_SLEEP_T
@@ -443,6 +447,8 @@ sleep_level_t wifi_get_sleep_level(void);
 bool wifi_set_listen_interval(uint8 interval);
 uint8 wifi_get_listen_interval(void);
 
+#endif
+
 bool wifi_set_sleep_type(sleep_type_t type);
 sleep_type_t wifi_get_sleep_type(void);