ble_mesh: stack: Split model Kconfig menu into foundation and others

components/bt/esp_ble_mesh/Kconfig.in

@@ -861,7 +861,7 @@ if BLE_MESH
             uses 0 as the timeout value when sending acknowledged messages, then
             the default value will be used which is four seconds.
 
-    menu "Support for BLE Mesh client/server models"
+    menu "Support for BLE Mesh Foundation models"
 
         config BLE_MESH_CFG_CLI
             bool "Configuration Client model"
@@ -873,6 +873,10 @@ if BLE_MESH
             help
                 Enable support for Health Client model.
 
+    endmenu #Support for BLE Mesh Foundation models
+
+    menu "Support for BLE Mesh Client/Server models"
+
         config BLE_MESH_GENERIC_ONOFF_CLI
             bool "Generic OnOff Client model"
             help
@@ -982,7 +986,7 @@ if BLE_MESH
             help
                 Enable support for Lighting server models.
 
-    endmenu
+    endmenu #Support for BLE Mesh Client/Server models
 
     config BLE_MESH_IV_UPDATE_TEST
         bool "Test the IV Update Procedure"