The test_rebuild_no_changes test verifies that running idf.py build
successively without any file changes results in identical build
artifacts on the second run (i.e., nothing gets rebuilt).
This test was failing in buildv2 because it expected kconfig_menus.json
to be present in build/config/ after a normal build. However, in
cmakev2, kconfig_menus.json is not generated during regular builds.
In cmakev1, kconfig_menus.json was generated globally during every
build alongside other config files (sdkconfig.h, sdkconfig.cmake, etc).
In cmakev2, kconfig_menus.json generation does not happend for
normal builds because it depends on the Kconfig menu hierarchy
and cannot be generated globally. It must be generated per-executable.
Hence, this commit updates the artefacts list for cmakev2 to not expect
the kconfig_menus.json file during a build/re-build action.
