scripts: compliance: Fix handling of integer node items

Some node items in Kconfig can be kconfiglib.MENU or kconfiglib.COMMENT.
Those are integers and thus do not contain a node.item.name field.
Handle those separately to avoid hitting the followig exception:

Traceback (most recent call last):
  File "/home/runner/work/zephyr/zephyr/./scripts/ci/check_compliance.py",\
  line 1307, in main
    n_fails = _main(args)
  File "/home/runner/work/zephyr/zephyr/./scripts/ci/check_compliance.py",\
  line 1242, in _main
    test.run()
  File "/home/runner/work/zephyr/zephyr/./scripts/ci/check_compliance.py",\
  line 277, in run
    self.check_no_redefined_in_defconfig(kconf)
  File "/home/runner/work/zephyr/zephyr/./scripts/ci/check_compliance.py",\
  line 445, in check_no_redefined_in_defconfig
    Kconfig node '{node.item.name}' found with prompt or help in\
    {node.filename}.
AttributeError: 'int' object has no attribute 'name'

Seen in #58454.

Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>