[nrf toup][platform] Added missing net_if.h include

With the recent Zephyr upmerge additional net_if.h includes
are needed for the nrfconnect and Zephyr platforms.

Author: kkasperczyk-no

src/platform/Zephyr/ConfigurationManagerImpl.cpp

@@ -32,6 +32,8 @@
 
 #include "InetUtils.h"
 
+#include <zephyr/net/net_if.h>
+
 #include <lib/support/CodeUtils.h>
 #include <lib/support/logging/CHIPLogging.h>
 

src/platform/nrfconnect/ConnectivityManagerImpl.cpp

@@ -23,6 +23,7 @@
 #include <platform/ConnectivityManager.h>
 #include <platform/Zephyr/InetUtils.h>
 #include <platform/internal/BLEManager.h>
+#include <zephyr/net/net_if.h>
 
 #include <platform/internal/GenericConnectivityManagerImpl_UDP.ipp>