doc: releases: add notes for namespaced generated headers

  out-of-tree SoCs and boards to be ported to the new model. See the

  :ref:`hw_model_v2` for more detailed information. (:github:`69607`)

* The following build-time generated headers:

  .. list-table::

     :header-rows: 1

     * - Affected header files

     * - ``app_version.h``

     * - ``cmake_intdef.h``

     * - ``core-isa-dM.h``

     * - ``devicetree_generated.h``

     * - ``driver-validation.h``

     * - ``kobj-types-enum.h``

     * - ``linker-kobject-prebuilt-data.h``

     * - ``linker-kobject-prebuilt-priv-stacks.h``

     * - ``linker-kobject-prebuilt-rodata.h``

     * - ``mcuboot_version.h``

     * - ``offsets.h``

     * - ``otype-to-size.h``

     * - ``otype-to-str.h``

     * - ``strerror_table.h``

     * - ``strsignal_table.h``

     * - ``syscall_list.h``

     * - ``version.h``

     * - ``zsr.h``

  and syscall headers are now namespaced into the ``zephyr/`` folder. The change is largely

  automated, and the script can be found in :github:`63973`.

  For the time being, the compatibility Kconfig (:kconfig:option:`CONFIG_LEGACY_GENERATED_INCLUDE_PATH`)

  is enabled by default so that downstream applications will continue to compile, a warning message

  will be generated during CMake configuration time.

  This Kconfig will be deprecated and eventually removed in the future, developers are advised to

  update the include paths of these affected headers as soon as possible.

Kernel

******