[NXP][Zephyr] Integrate wifi improvements and updates from nrfconnect (project-chip#35273)

* [NXP][Zephyr] Integrate wifi improvements and updates from nrfconnect

 * WiFiNetworkDiagnostics events generation
 * Make Wi-Fi manager use Wi-Fi interface only
 * Rework joining/leaving mcast group
 * mDNS refresh after IPv6 change
 * Scan for a specific SSID
 * Fix tx/rx unicast counters
 * Fix missing network band in scan response
 * Various other fixes/improvements

Signed-off-by: Axel Le Bourhis <axel.lebourhis@nxp.com>

* Restyled by clang-format

---------

Signed-off-by: Axel Le Bourhis <axel.lebourhis@nxp.com>
Co-authored-by: Restyled.io <commits@restyled.io>

Author: axelnxp

src/platform/Zephyr/wifi/ConnectivityManagerImplWiFi.cpp

@@ -42,7 +42,7 @@ ConnectivityManager::WiFiStationMode ConnectivityManagerImplWiFi::_GetWiFiStatio
 {
     if (mStationMode != ConnectivityManager::WiFiStationMode::kWiFiStationMode_ApplicationControlled)
     {
-        mStationMode = (WiFiManager::StationStatus::DISABLED == WiFiManager().Instance().GetStationStatus())
+        mStationMode = (WiFiManager::StationStatus::DISABLED == WiFiManager::Instance().GetStationStatus())
             ? ConnectivityManager::WiFiStationMode::kWiFiStationMode_Disabled
             : ConnectivityManager::WiFiStationMode::kWiFiStationMode_Enabled;
     }
@@ -60,7 +60,7 @@ CHIP_ERROR ConnectivityManagerImplWiFi::_SetWiFiStationMode(ConnectivityManager:
 
 bool ConnectivityManagerImplWiFi::_IsWiFiStationEnabled(void)
 {
-    return (WiFiManager::StationStatus::DISABLED <= WiFiManager().Instance().GetStationStatus());
+    return (WiFiManager::StationStatus::DISABLED <= WiFiManager::Instance().GetStationStatus());
 }
 
 bool ConnectivityManagerImplWiFi::_IsWiFiStationApplicationControlled(void)
@@ -70,7 +70,7 @@ bool ConnectivityManagerImplWiFi::_IsWiFiStationApplicationControlled(void)
 
 bool ConnectivityManagerImplWiFi::_IsWiFiStationConnected(void)
 {
-    return (WiFiManager::StationStatus::CONNECTED == WiFiManager().Instance().GetStationStatus());
+    return (WiFiManager::StationStatus::CONNECTED == WiFiManager::Instance().GetStationStatus());
 }
 
 System::Clock::Timeout ConnectivityManagerImplWiFi::_GetWiFiStationReconnectInterval(void)
@@ -88,14 +88,14 @@ bool ConnectivityManagerImplWiFi::_IsWiFiStationProvisioned(void)
 {
     // from Matter perspective `provisioned` means that the supplicant has been provided
     // with SSID and password (doesn't matter if valid or not)
-    return (WiFiManager::StationStatus::CONNECTING <= WiFiManager().Instance().GetStationStatus());
+    return (WiFiManager::StationStatus::CONNECTING <= WiFiManager::Instance().GetStationStatus());
 }
 
 void ConnectivityManagerImplWiFi::_ClearWiFiStationProvision(void)
 {
     if (_IsWiFiStationProvisioned())
     {
-        if (CHIP_NO_ERROR != WiFiManager().Instance().ClearStationProvisioningData())
+        if (CHIP_NO_ERROR != WiFiManager::Instance().ClearStationProvisioningData())
         {
             ChipLogError(DeviceLayer, "Cannot clear WiFi station provisioning data");
         }
@@ -104,9 +104,9 @@ void ConnectivityManagerImplWiFi::_ClearWiFiStationProvision(void)
 
 bool ConnectivityManagerImplWiFi::_CanStartWiFiScan()
 {
-    return (WiFiManager::StationStatus::DISABLED != WiFiManager().Instance().GetStationStatus() &&
-            WiFiManager::StationStatus::SCANNING != WiFiManager().Instance().GetStationStatus() &&
-            WiFiManager::StationStatus::CONNECTING != WiFiManager().Instance().GetStationStatus());
+    return (WiFiManager::StationStatus::DISABLED != WiFiManager::Instance().GetStationStatus() &&
+            WiFiManager::StationStatus::SCANNING != WiFiManager::Instance().GetStationStatus() &&
+            WiFiManager::StationStatus::CONNECTING != WiFiManager::Instance().GetStationStatus());
 }
 
 void ConnectivityManagerImplWiFi::_OnWiFiStationProvisionChange()