[nrf noup] Workaround for identify server.

After moving Identify server to be code-driven there is a potential
race condition on the connection between zap-driven groups-server
and code-driven Identify server. In Matter upstream groups-server
has been converted to code-driven, so provide a quick workaround
here to pass certification tests.

TO BE REMOVED WHILE SYNCHRONIZING MATTER SDK.

Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

src/app/clusters/groups-server/groups-server.cpp

@@ -21,12 +21,16 @@
 #include <app-common/zap-generated/cluster-objects.h>
 #include <app-common/zap-generated/ids/Clusters.h>
 #include <app/CommandHandler.h>
+#include <app/ConcreteClusterPath.h>
 #include <app/clusters/identify-server/CodegenIntegration.h>
+#include <app/clusters/identify-server/IdentifyCluster.h>
 #include <app/reporting/reporting.h>
 #include <app/util/config.h>
 #include <credentials/GroupDataProvider.h>
+#include <data-model-providers/codegen/CodegenDataModelProvider.h>
 #include <inttypes.h>
 #include <lib/support/CodeUtils.h>
+#include <platform/PlatformManager.h>
 #include <tracing/macros.h>
 
 #ifdef MATTER_DM_PLUGIN_SCENES_MANAGEMENT
@@ -45,7 +49,20 @@ static bool emberAfIsDeviceIdentifying(EndpointId endpoint)
 {
 #ifdef ZCL_USING_IDENTIFY_CLUSTER_SERVER
     auto cluster = FindIdentifyClusterOnEndpoint(endpoint);
-    return cluster != nullptr && cluster->GetIdentifyTime() > 0;
+    if (cluster != nullptr)
+    {
+        return cluster->GetIdentifyTime() > 0;
+    }
+
+    // Workaround - Code-driven implementation
+    chip::app::ServerClusterInterface * iface = chip::app::CodegenDataModelProvider::Instance().Registry().Get(
+        chip::app::ConcreteClusterPath(endpoint, chip::app::Clusters::Identify::Id));
+    if (iface != nullptr)
+    {
+        auto * idCluster = static_cast<chip::app::Clusters::IdentifyCluster *>(iface);
+        return idCluster->GetIdentifyTime() > 0;
+    }
+    return false;
 #else
     return false;
 #endif