marking tests that are os-dependent

Signed-off-by: Karolina Rogowska <karolina.rogowska@intel.com>

test/functional/tests/initialize/test_clean_reboot.py

@@ -1,5 +1,5 @@
 #
-# Copyright(c) 2020-2021 Intel Corporation
+# Copyright(c) 2020-2022 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -20,6 +20,7 @@ from test_utils.size import Size, Unit
 mount_point = "/mnt/test"
 
 
+@pytest.mark.os_dependent
 @pytest.mark.require_disk("cache", DiskTypeSet([DiskType.optane, DiskType.nand]))
 @pytest.mark.require_disk("core", DiskTypeLowerThan("cache"))
 @pytest.mark.parametrizex("cache_mode", CacheMode)