tools/selftets/damon/sysfs: test tried_regions directory existence

mainline inclusion
from mainline-v6.2-rc6
commit 2b3ee3f6
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6MRUG

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=2b3ee3f66c673312ea377bcfb54cb2b9abc8473b

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Add a simple test case for ensuring tried_regions directory existence.

Link: https://lkml.kernel.org/r/20221101220328.95765-7-sj@kernel.org


Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ze Zuo <zuoze1@huawei.com>