tests: logging: log_stack: Fix Kconfig option

Renaming:
- CONFIG_TEST_EXTRA_STACKSIZE -> CONFIG_TEST_EXTRA_STACK_SIZE
- CONFIG_ZTEST_STACKSIZE -> CONFIG_ZTEST_STACK_SIZE

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
1 file changed