feat(esp_wifi): Refactor and improve FTM code

Enable FTM Responder mode for ESP32C6. Update wifi libs with below -

1. Break FTM State Machine code into separate functions
2. Use dynamic allocation for FTM session to save memory
3. Add API to get FTM report instead of event based mechanism
4. Add FTM Request retry and comeback support

components/esp_wifi/include/esp_wifi.h

@@ -1294,6 +1294,26 @@ esp_err_t esp_wifi_ftm_end_session(void);
   */
 esp_err_t esp_wifi_ftm_resp_set_offset(int16_t offset_cm);
 
+/**
+  * @brief      Get FTM measurements report copied into a user provided buffer.
+  *
+  * @attention  1. To get the FTM report, user first needs to allocate a buffer of size
+  *                (sizeof(wifi_ftm_report_entry_t) * num_entries) where the API will fill up to num_entries
+  *                valid FTM measurements in the buffer. Total number of entries can be found in the event
+  *                WIFI_EVENT_FTM_REPORT as ftm_report_num_entries
+  * @attention  2. The internal FTM report is freed upon use of this API which means the API can only be used
+  *                once afer every FTM session initiated
+  * @attention  3. Passing the buffer as NULL merely frees the FTM report
+  *
+  * @param      report  Pointer to the buffer for receiving the FTM report
+  * @param      num_entries Number of FTM report entries to be filled in the report
+  *
+  * @return
+  *    - ESP_OK: succeed
+  *    - others: failed
+  */
+esp_err_t esp_wifi_ftm_get_report(wifi_ftm_report_entry_t *report, uint8_t num_entries);
+
 /**
   * @brief      Enable or disable 11b rate of specified interface
   *