provisioning: Fix enable CONFIG_EXAMPLE_RESET_PROVISIONED will cause device crash

Closes https://github.com/espressif/esp-idf/issues/6240

examples/provisioning/legacy/ble_prov/main/app_prov.c

@@ -283,7 +283,8 @@ esp_err_t app_prov_is_provisioned(bool *provisioned)
     *provisioned = false;
 
 #ifdef CONFIG_EXAMPLE_RESET_PROVISIONED
-    nvs_flash_erase();
+    esp_wifi_restore();
+    return ESP_OK;
 #endif
 
     /* Get WiFi Station configuration */

examples/provisioning/legacy/console_prov/main/app_prov.c

@@ -221,7 +221,8 @@ esp_err_t app_prov_is_provisioned(bool *provisioned)
     *provisioned = false;
 
 #ifdef CONFIG_EXAMPLE_RESET_PROVISIONED
-    nvs_flash_erase();
+    esp_wifi_restore();
+    return ESP_OK;
 #endif
 
     /* Get WiFi Station configuration */

examples/provisioning/legacy/custom_config/main/app_prov.c

@@ -246,7 +246,8 @@ esp_err_t app_prov_is_provisioned(bool *provisioned)
     *provisioned = false;
 
 #ifdef CONFIG_EXAMPLE_RESET_PROVISIONED
-    nvs_flash_erase();
+    esp_wifi_restore();
+    return ESP_OK;
 #endif
 
     /* Get WiFi Station configuration */

examples/provisioning/legacy/softap_prov/main/app_prov.c

@@ -232,7 +232,8 @@ esp_err_t app_prov_is_provisioned(bool *provisioned)
     *provisioned = false;
 
 #ifdef CONFIG_EXAMPLE_RESET_PROVISIONED
-    nvs_flash_erase();
+    esp_wifi_restore();
+    return ESP_OK;
 #endif
 
     /* Get WiFi Station configuration */