[Silabs] Adding disconnect on factory reset and OTA rename to multi ota (#34098)

* adding disconnect on factory reset and OTA rename

* Restyled by prettier-markdown

* modifying the md files as addressed

* replacing the ota_multi_image_tool to ota_image_tool

---------

Co-authored-by: Restyled.io <commits@restyled.io>

Author: chirag-silabs

scripts/tools/silabs/ota/README.md

@@ -21,7 +21,7 @@ This is a wrapper over standard `ota_image_tool.py`, so the options for `create`
 are also available here:
 
 ```
-python3 ./scripts/tools/silabs/ota/ota_image_tool.py create -v 0xDEAD -p 0xBEEF -vn 50000 -vs "1.0" -da sha256
+python3 ./scripts/tools/silabs/ota/ota_multi_image_tool.py create -v 0xDEAD -p 0xBEEF -vn 50000 -vs "1.0" -da sha256
 ```
 
 followed by \*_custom options_- and a positional argument (should be last) that

scripts/tools/silabs/ota/ota_image_tool.py scripts/tools/silabs/ota/ota_multi_image_tool.py

@@ -283,6 +283,11 @@ void ConfigurationManagerImpl::DoFactoryReset(intptr_t arg)
     PersistedStorage::KeyValueStoreMgrImpl().ErasePartition();
 
 #if CHIP_DEVICE_CONFIG_ENABLE_WIFI_STATION
+    sl_status_t status = wfx_sta_discon();
+    if (status != SL_STATUS_OK)
+    {
+        ChipLogError(DeviceLayer, "wfx_sta_discon() failed: %lx", status);
+    }
     ChipLogProgress(DeviceLayer, "Clearing WiFi provision");
     wfx_clear_wifi_provision();
 #endif // CHIP_DEVICE_CONFIG_ENABLE_WIFI_STATION