Revert "kunit: configs: Enable CONFIG_INIT_STACK_ALL_PATTERN in all_tests"

This reverts commit a571a9a1b120264e24b41eddf1ac5140131bfa84.

The commit in question breaks kunit for older compilers:

$ gcc --version
gcc (GCC) 11.5.0 20240719 (Red Hat 11.5.0-5)

$ ./tools/testing/kunit/kunit.py run --alltests --json --arch=x86_64
Configuring KUnit Kernel ...
Regenerating .config ...
Populating config with:
$ make ARCH=x86_64 O=.kunit olddefconfig
ERROR:root:Not all Kconfig options selected in kunitconfig were in the generated .config.
This is probably due to unsatisfied dependencies.
Missing: CONFIG_INIT_STACK_ALL_PATTERN=y

Link: https://lore.kernel.org/[e-mail]
Fixes: a571a9a1b120 ("kunit: configs: Enable CONFIG_INIT_STACK_ALL_PATTERN in all_tests")
Signed-off-by: Jakub Kicinski <[e-mail]>
Acked-by: Mark Brown <[e-mail]>
Acked-by: Shuah Khan <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Paolo Abeni <[e-mail]>

tools/testing/kunit/configs/all_tests.config

···
 CONFIG_KUNIT_ALL_TESTS=y
 
 CONFIG_FORTIFY_SOURCE=y
-CONFIG_INIT_STACK_ALL_PATTERN=y
 
 CONFIG_IIO=y