fs: add helper fs_file_read_do_trace()

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4H3JT


CVE: NA

---------------------------

fs_file_read_do_trace() uses writable-tracepoint to update f_mode
for file read procedure. Also export it to make it being usable
for filesystem kernel module.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Acked-by: fang wei <fangwei1@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>