[nrf fromtree] samples/subsys/fs/zms: run on native_sim instead of native_posix

native_posix is deprecated and will be removed in 4.2
Run this sample in native_sim instead.

Signed-off-by: Alberto Escolar Piedras <[email protected]>
(cherry picked from commit 4a91a55)

Author: aescolar

samples/subsys/fs/zms/sample.yaml

@@ -7,4 +7,4 @@ tests:
     depends_on: zms
     platform_allow:
       - qemu_x86
-      - native_posix
+      - native_sim