[nrf noup] Clear srp implementation.

This commit implements the host srp clear,
using cherry-picked upstream solution.

Signed-off-by: Patryk Lipinski <patryk.lipinski@nordicsemi.no>

src/platform/Zephyr/ConfigurationManagerImpl.cpp

@@ -42,7 +42,7 @@
 
 #ifdef CONFIG_NET_L2_OPENTHREAD
 #include <platform/ThreadStackManager.h>
-#endif 
+#endif
 
 namespace chip {
 namespace DeviceLayer {
@@ -181,6 +181,12 @@ void ConfigurationManagerImpl::DoFactoryReset(intptr_t arg)
 {
     ChipLogProgress(DeviceLayer, "Performing factory reset");
 
+#if CHIP_DEVICE_CONFIG_ENABLE_THREAD_SRP_CLIENT
+    ThreadStackMgr().WaitOnSrpClearAllComplete();
+    ThreadStackMgr().ClearAllSrpHostAndServices();
+    ThreadStackMgr().NotifySrpClearAllComplete();
+#endif // CHIP_DEVICE_CONFIG_ENABLE_THREAD_SRP_CLIENT
+
 // Lock the Thread stack to avoid unwanted interaction with settings NVS during factory reset.
 #ifdef CONFIG_NET_L2_OPENTHREAD
     ThreadStackMgr().LockThreadStack();