This patch-set contains two minor fixes and some related cleanup for the
warn_changed_input test:

  * The kconfig test 'warn_changed_input' fails if the environment
    variable KCONFIG_WARN_CHANGED_INPUT is set non-empty.  The first
    patch resets KCONFIG_WARN_CHANGED_INPUT by default for all tests
    to make the 'warn_changed_input' test more stable.

  * The kconfig test framework provides 'olddefconfig' and
    'savedefconfig' wrappers, which fail short when it comes to real
    usage.  The 'warn_changed_input' worked-around by calling the
    framework-internal '_run_conf' function.  The remaining three
    patches extend 'olddefconfig' and 'savedefconfig' wrappers and
    simplify 'warn_changed_input' appropriately.

Signed-off-by: Nicolas Schier <n.schier@fritz.com>
---
Nicolas Schier (4):
      kconfig: tests: Reset KCONFIG_WARN_CHANGED_INPUT by default
      kconfig: tests: Provide defconfig outfile for savedefconfig
      kconfig: tests: warn_changed_input: Simplify by reusing the extra env
      kconfig: tests: {old,save}defconfig: Forward dynamic keyword arguments

 scripts/kconfig/tests/conftest.py                   | 18 ++++++++++++++----
 .../kconfig/tests/warn_changed_input/__init__.py    | 21 ++++++++-------------
 2 files changed, 22 insertions(+), 17 deletions(-)
---
base-commit: 237a1c39e8dfd3e1c6f1f023eea37a48ec04cc63
change-id: 20260917-kconfig-tests-minor-updates-c0871950c6fa

Best regards,
--  
Nicolas Schier