`ZVFS_OPEN_SIZE` define applied irrespective of configuration

[nordicjm]

Describe the bug

This define seemingly is set for all builds, irrespective if the feature is enabled or not, it should only be provided if the feature Kconfig is enabled for it

Regression

• This is a regression.

Steps to reproduce

Build hello_world for nrf52840dk/nrf52840 and examine build flags for main.c in build.ninja file

Relevant log output

#############################################
# Order-only phony target for app

build cmake_object_order_depends_target_app: phony || zephyr/device_api_ld_target zephyr/driver_validation_h_target zephyr/kobj_type>

build CMakeFiles/app.dir/src/main.c.obj: C_COMPILER__app_unscanned_ /tmp/aa/zephyr/samples/hello_world/src/main.c || cmake_object_or>
  DEFINES =
-DKERNEL -DK_HEAP_MEM_POOL_SIZE=0 -DPICOLIBC_LONG_LONG_PRINTF_SCANF -DZVFS_OPEN_SIZE=0 -D_POSIX_THREAD_SAFE_FUNCTIONS=200809L -D__LI>

Impact

Annoyance – Minor irritation; no significant impact on usability or functionality.

Environment

Commit: c960d0e

Additional Context

No response