Revert "kunit: configs: Enable CONFIG_INIT_STACK_ALL_PATTERN in all_tests"

This reverts commit a571a9a.

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/20250529083811.778bc31b@kernel.org
Fixes: a571a9a ("kunit: configs: Enable CONFIG_INIT_STACK_ALL_PATTERN in all_tests")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: NipaLocal <nipa@local>

Author: kuba-moo

tools/testing/kunit/configs/all_tests.config

@@ -10,7 +10,6 @@ CONFIG_KUNIT_EXAMPLE_TEST=y
 CONFIG_KUNIT_ALL_TESTS=y
 
 CONFIG_FORTIFY_SOURCE=y
-CONFIG_INIT_STACK_ALL_PATTERN=y
 
 CONFIG_IIO=y